Last night I sneezed while holding in urine. I had the most terrible pain around my uterine/female area. It lasted a couple seconds then went away. I'm around ovulation time. What could it be and what should I do?

Several possibilitis. One possibility is that you ovulated at that moment and experienced the pain called "mittelschmerz". You may also have had a bladder pain from the sudden pressure on your full bladder, and there are other possibilities too. If it recurs or other symptoms develop, talk to your doctor!