Lately Ive been getting random, intense cramps on the right side of my pelvis that usually last no longer that 10 seconds.

I've been feeling slight nausea. Today my lower back was in pain. Ive been getting headaches and my breasts are tender. My appitite hasnt  been up to par and I also have been getting a slight burning sensation in the top of my stomach right in the middle underneath my rib cage. And I have also been burping alot. Please help.