I feel disgusting

This is not a post for sympathy. I just need help and I don’t know how to feel. I know people are going to be mean and think I’m trying to get attention so I’m posting anonymously. I’m upset tonight (may 25th) because I was getting ready to get in the shower and was looking at myself in the mirror and I know stretch marks aren’t a bad thing but I’m getting new ones on my lower back and butt. Now I wasn’t hurt when they were on my boobs or inner thighs or even outer thighs but on my butt and especially my lower back I feel disgusting. i have a ballet recital the first weekend in June and I don’t want to be the fattest girl on stage and I don’t want more stretch marks I feel ashamed how am I supposed to wear a crop top or do anything that will show my back. I am so fat and I’m thinking about just not eating breakfast and lunch, cutting out bread and dairy just until I am skinny. I don’t want to get sick but if I do that and work out I will lose the weight. I’m 5’5” and 192 pounds I feel so ugly and I don’t even want my boyfriend to see me. I’m so embarrassed and as of right now I don’t plan on eating until tomorrow night but I will drink tons of water. I want to be able to wear a bikini this summer. I envy my sister because she is so small and I just don’t know how she got the easy naturally skinny. I just needed to get this off my chest please don’t be mean to me