ok so yesterday i was changing my clothes and my crotch was REALLY itching, so i look down and there's this bump a lil smaller than a dime and it didnt hurt or anything but when i push down on it or poke it it goes down then comes back out as if it has liquid inside of it, then this morning it changed and looked like it could b some wierd type of pimple, and now its gone down quite a bit, should i c a doctor??