so I started play 1.50 HUSNG about 10 months ago... I did ok and grinded up to 3.50 ( I was doing about 20BI BRM) then I went to 7 and lost a few moved back down to 3.50 and eventually lost it all and busted. This was over the course of 3 months and I quit online poker for about 2 months.

When I came back I promised I was gonna use a better BRM and focus on avoiding tilting, it worked out fine and I grinded 25$-100$ and was able to move into the 3.50HUSNG games. Throughout this point I learned a lot about exploiting villains imbalances instead of playing a overall value betting strategy to win. The 3.50 grind to 240$ was easier and also a lot of fun because I learned how to exploit even a more range of villains. Now I'm at the 7$ and I feel very scared in my stomach I have 35BI I'm currently winning 12/16 games, I feel some of this is attributed to luck but on the other hand I feel these villains are just the same and I'm crushing them. I don't know what this feeling is but maybe I need to celebrate, this is a big milestone for me and I can't really express my joy to others cause no one understands. Furthermore it feels like this milestone just made me think, now what?

I'm really happy and proud of where I am at, I went through a lot of mental struggles, came through them and feel somewhat confident in my game (I always had trouble with confidence in my life, my confidence is always forced). Maybe I should somehow commend myself I'm feeling a bit stressed out here I think, take a break?

Grind 50BI for 7$ if you're not feeling comfortable playing them.
If you don't enjoy the 3.50's anymore, take a break.

It still should be easy. Come out with 3 bets alot early on in the match and c-bet the flop. That will give u the chip lead early. People always tend to fold when you do that. Just be super aggressive until you get resistance.

Ok guys thanks for the advice, I think I'm fine with my BRM.
I think I found out what it was that gave me this feeling, it was not knowing exactly why I was beating the stakes because I mainly just play by feel. My style is to try to adjust to opponents mistakes and exploit them, thing is I obviously am adjusting fine, but I don't know if I'm adjusting correctly vs different opponents which gives me this uncertain feeling.

Stake is not much harder but I do see more regs, but the regs are not to hard either
Currently I'm doing good 53 games @ 66% ITM.

I'll try being agressive, but I noticed at certain times of day (late afternoon-mid evening) there seems to be a flood of maniac aggresive players so maybe just not at those times

force them to adjust their game to your game early in the match.
if they do or dont, you will see, and adjust to them accordingly later on.
if you play familar opponents it obviously differs.
you are the one who is good enough to move up, your opponents mostly lose or cant beat 7$ hard enough to move up, you are for sure better than 90% of them.