I'm a 20 year old medical student.

I've had on-off dull nausea for the past 3-4 days. It tends to get worse after food and during the early mornings and evenings. I've also been bloated for the past few days. Burping sometimes relieves the nausea temporarily.

I had minor surgery for removal of plantar warts a week ago. The wound is beginning to heal.

I have a final in less than two weeks.
I got very little sleep 4 days ago because I was studying for an exam.

Could my symptoms be stress related? If not, what could be wrong with me?