I woke up with random bruises on my legs and knees, i don't bruise easily, and my boyfriend said i don't fight in my sleep or anything, so what's going on?

Bruises: If the bruises are over your legs only this is consistent with itp immune thrombocytopenia purpura which means destruction of platelets 70-80% unknown etiology could be hiv, hepatitis c , rheumatologic diseases joint pains if any, helicobacter pylori of the stomach or if you have bowel problems could be from celiac disease or gluten sensitivity at any rate self limiting in most cases see speciali.