Low Sharp Pains?

Anyone else experience a short, sharp pain very low in the pelvic area? The only way I can describe it is like a nerve being pinched, or like when you have to pee really bad and there is a sharp sting. It only lasts a second, and happens when I am standing. It stopped me in my tracks the first time, and has happened about 3 or 4 more times since yesterday. I'm a FTM, 32 weeks. I have a Dr. Appt on Tuesday, but just curious if anyone else has had this. TIA for any input! :)