Hi there, I am FREAKING out right now because of insomnia specifically a fear of SFI or even FFI. Within the past ~one week or so, I started to get insomnia, pretty much for the first time ever. It's been coupled with some horrible anxiety, really strange anxiety, some of the worst I've ever had(I've always had anxiety), like I'm having a constant panic attack, then coupled with occasional crying. This was precipitated by my sleep being on a fucked up schedule, before this it was like from 9AM-5PM. I started getting horrible anxiety, and chalked it up to only being up during the night and not seeing daylight(or my family). I decided to fix it, but that didn't really go to well, ultimately it led to deprivation during the day too, so then my anxiety got worse, and then I decided to start practicing some good sleep hygiene, taking a walk before bed, warm shower before, no computer, blue light filter on my phone and only use it a little bit, lights out, go to sleep at 12:30 or so AM and I took 1.5 benadryls. Still, that night I tossed and turned for like 4-5 hours, until finally I slept until 10 AM or so. Then the next night was the same, good hygiene, took 50mg benadryl and also about 4mg melatonin. Still, tossed and turned until the early morning hours, woke up maybe around 9:30 or so. Next night, same deal, did the hygiene, this time about 62.5mg doxylamine and also about 4mg melatonin, I was a little loopy that night, but it was the same deal, early morning hours, woke up around 9 and again at 12 I believe, that night was spotty. Last night, same deal, did the hygiene, this time 75mg doxylamine and an obscene amount of melatonin, maybe 30-40mg spread out, sleep was spotty but I think I got to sleep around 4-5AM, woke up at 6, again at 11, and then at 12. So obviously, not so good. The past two nights were also weird, as though there was not a clear line between sleeping and being awake, and my sleep was very fractured, also my memory of them is weird, like I thought I slept clean through to 11 but then remembered a brief bit of it being 6 AM. This makes me afraid that maybe my sleep is even more fractured than what I can remember. Overall, it's been over a week since I slept more than a clean 5 hours. Worth noting that while both the doxylamine and the benadryl maybe were a bit/somewhat helpful in feeling tired, definitely neither knocked me out, even the high dose.

Then just today I read a bit about SFI on this sub and around on reddit and the web, and now I'm FREAKING out. What makes me nervous is that before any of this happened, it seemed like my balanced was a little weird, like I would get dizzy-light headed more, and it took less to make me feel unbalanced. And, throughout this, my heartrate's been super fast, I measured it a bit ago and it was almost 150. Even when I though I was relaxed today, it was between 120-130. I just measured it now and it was at 93, which is actually amongst the lowest that I've seen since I started measuring. Also I've been getting facial flush, like I'll be doing something and then my face will suddenly get a rush of warmth. Also, my muscles have started to feel weird, like they're worn out, despite barely using them. Right now I was pacing and my legs felt exhausted, and hen after lying down briefly I tried to walk but they felt so weak I almost fell over briefly. And I'm losing weight too, although I've barely eaten the past week, maybe an average of a few hundred calories a day on average, some days maybe barely 100. I don't know how much it is that I've lost, but it's enough that when I put on my belt today it was pretty loose, even kind of hanging off of me. I have also noticed that sometimes I feel either hotter or colder than those around me. At night I get hot and sweat a bit. I have been constipated too, that's another symptom. I poop once a day, but this past week I pooped maybe once or twice, probably last time was about 5 days ago. There isn't an instance of this in my family history,

I am FREAKING out about this now. I'm trying rationalize, but it is so hard when things seem to match up. I try to tell myself that this is just anxiety, but it seems so severe, and it came on so suddenly. This is also just about the first time I've ever actually had insomnia properly, outside of it taking a while to get to sleep. The only arrow in my quiver is how exceedingly rare FI is, but still, it's terrifying when the puzzle seems to fit together. I'm so afraid. Please help me rationalize this. I just wanna be okay.