Struggling with Eating: Coping with a Breakup

I haven’t been eating lately. I’ve gone through a stressful breakup and I don’t know how to cope. It could maybe be because I feel some guilt and I’m taking it out on myself. I have low blood sugar so it’s not good that I’m not eating. When I chew food, I start gagging and I can’t finish anything. I’m eating my favorite food rn and I was only able to take a couple bites because I feel nauseous. I also have an ear infection and haven’t been feeling good either. I am taking some medication that could be causing me being nauseous. I’m waking up at crazy hours throwing up; it’s not that I want to, but my body’s just forcing me to do it. My shorts are getting loose on me and my body feels so different. Is it possible that I could have an eating disorder?