Feeling off...

The last couple of weeks i have been fighting a huge head ache and stomach ache. On monday i had a rather embarrassing moment. I recently have started my practical bit at the hospital and during a round with all the doctors and nurses everything just went black. Im still feeling off and really start to worry. Im not the one to complain about pains here or there but this is just very weird as i cant even keep the food i am eating. My head is constantly thumping and the second im eating something it wants to head back up. Hope this will change soon...