This was my first time doing nitrous and it was pretty cool

I decided to do edibles, whippets, and for some reason I decided to try doing poppers at the same time. I use a balloon both nights, the balloon having 2 whippets. First night, I did not feel anything so I guess I didn’t hold my breath long enough or something so I decided to give it the next night and take a break afterwards to be safe. The next night, everything the same. This time, I held my breathe for around 10-15 seconds and it felt like I got sent and everything immediately felt “lit” for lack of a better word. It was cool and slightly scary as I wasn’t ready for that. I did some research but now I just want to personally ask some things

*My questions, How long do you hold the nos in for and how deep?

Does the high normally feel like you’re getting sent?

Should I supplement B12/ get a shot? I’m close to a clinic that gives them. I wasn’t sure since I did 4 over 2 days so.

How long again before I can use nos safely? I seen a month, months, or depending, a full year.

Thanks!

Also, I recently came out of a virus which kinda kept me from eating for a few days last week not sure if that could affect b12 right now either.