 [ Symptoms ] identify this blister like in appearance solid core white bump on skin no redness no pain as an athlete i have dealt with blisters on the common and when they do not heal i usually take to draining them myself yes i know this is not recommended  however this bump so to speak is unlike a blister in that it is shape is almost perfectly circular i have also come to notice there is no liquid but it instead seems to be solid almost like something is embedded under the skin as i said there is no pain or tenderness involved it is just a bump been there about four weeks [ Disease ] hi your find out by reading up on periods through pregnancy happens but there just short 3 day periods and these go all through your pregnancy but if this is some vaginal bleeding showing fresh red blood if that is the case then doctors asap hope this helps good luck