Is this too skinny?

I've been having so much stress lately with exams and stuff and I lost some kilos. I've always been skinny but now I feel muuch more skinnier and i don't really like it.

I'm trying to gain some wait by (and yes this sounds weird) drinking baby milk powder. I think it's working because it has in a lot of nutrients. My ex also said I was very skinny and that kind of affected my self esteem.

I also don't have ANY boobs so I'm trying to see if this could make a difference.