I just am lost (possibly triggering)

So I’m in the military and we have VERY strict weight standards to meet. I’m 5’2 and weigh probably 138-140 and I can’t weigh any more than 142 lbs. I don’t look overweight, but I can’t help but feel so fat. It’s to the point where I’m on the scale every 30 minutes and eating only a granola bar each day. Sometimes I don’t eat at all. I don’t know what to do because all I can think about is my weight and that stupid number of 142. It’s to the point where even thinking about eating makes me wanna vomit and get sick. The thought of eating just simply repulses me and if I do eat, I feel so guilty. I can’t even exercise anymore without almost passing out from not eating. I want to get help, but I don’t want to be reprimanded and being taken off my deployment and kicked out... I’m so lost on what to do. I feel so alone right now.