I just got home from jamaica. While i was there i got really sick, and I still have a really intense stomach ache. It started on wednesday of last week, its currently Monday. I woke up and I had gotten my period, and i had really bad cramps which is normal for me. We had an excursion planned that day for the beach so I went, but i got really warm and crampy, felt like i would pass out. I dont think i was used to the heat. The next day I woke up with really intense stomach pain, not like my cramps. I then threw up most of the day. I barely ate anything for 3/4 days, everything i would try to shallow i would throw it back up. And to top it all off I had really bad chest pain, and shortness of breath. The chest pain is now on and off, but it is really scaring me.  I am not on my period anymore, but still have the stomach pain, for 5 days now. It may be because i haven't been eating, I really dont know. I have been eating a bit more now that i can handle it, and it seems to be getting a bit better. Should I be worrying?