Hello, I’m a 16-year-old girl (17 on 18th Feb) and I was admitted to a hospital for 3 days in the first week of December because of a stomach ulcer, I was throwing up a lot of blood and I couldn’t eat for 2 days (I had an IV thing). I was under a lot of stress; we were going to start IB exams that week and I had been stressing for a long time. Not the kind of usual test stress but real test anxiety- I couldn’t sleep, I was constantly panicking, if I tried to talk about it I burst into tears and couldn’t control it, etc. I feel fine now, but I missed my period for December and now I missed it for January as well. Is this bad? Why is this? Should I be worried? I don't think it is stress anymore because I'm not stressing now, just sometimes if I forget to do something but its only a little.