Yesterday I was doing dips in the gym. On near my last rep I felt some intense pain out of nowhere. Its the spot in the back of your head where it dips in, the left muscle there. When I woke up this morning I head a huge headache and can feel that part throbbing in pain. My upper back hurts a little too (mainly shoulder area).
Aspirin makes it feel better for a while, any advice on what I should do?