8 months only on HRT... I say, give yourself more time !
I think you should wait at least 3-4 months, even if it hurts, before really considering FFS. I've read face changes linked to HRT take longer than other changes, and the older the person, the longer it takes. Even though I'm 19, I wouldn't envisage FFS until at least one year HRT.
And more : DON'T go to Mexico ! Even though it's cheaper, undergoing surgery in a country poorer than yours is not safe if you ask me, unless it's a really good surgeon known worldwide. You don't know how good the surgeon actually is, and a mistake could hurt you a lot for, like, forever. Plus, the laws there might not provide you with appropriate protection in case of medical error.
There's always a reason behind the lower price of something !