Opioid withdrawal or flu?

Dizziness/vertigo, nausea, migraine, HORRIBLE hot flashes and cold chills, sore muscles, sore throat.....

Idk if I was sold some bunk dope or if this is the flu because all symptoms lasted yesterday up until I went to bed with a dose of different fentanyl.

I'm almost thinking it could've been precipitated withdrawal? Like some asshat cut the dope with Suboxone because the more I did trying to get off sick of that one particular batch, the more sick I became.

Only thing is ... My bf feels shitty today with all the symptoms I had yesterday. And we've been having one odd symptom - vertigo/dizziness, for multiple days, and another symptom - diarrhea - that lasted three days and started a week ago.

But all other symptoms hit me like a sledge hammer yesterday morning til I found different dope and went to bed. As SOON as I dosed with the different fentanyl I immediately felt better. Everything stopped. Totally better. Only now my bf is sick with what appears to be the same sickness I had?

For him, he has no immune system and this could become serious if it is a flu. He has such a tiny amount of red blood cells. Going to hospital in the morning just in case.

Edit: migraine persistent for me, but other than that whatever I had has passed. Probably unto my boyfriend.

Also, I sniff the dope so I ALWAYS have a horribly painful nose, runny and stuffy 247. That's basically permanent. And depending on the cut they use in this crap sometimes it can burn your throat.