Smells.?

Okay so.... This is embarrassing but I don't care because we're all adults on this thing.! I'm 4 months and ealier this week I've notice this smell . I am STD free & haven't had sex since I found out about my pregnancy because I no longer deal with the father of my child. (Well he doesn't want to be in the child's life) any who.... I was checked at my 1st app for STDS everything came back clear.! I was just wondering has this happened to anyone else.? & if so what did you do.?