It may be an ingrown hair, I know how stupid that sounds. I had a lump that showed up when I was 7 months pregnant with my fitst child. It was very sore and had a red and purple color to it. I went in to see my OB and he told me that it was an infected ingrown hair. Take warm baths or place a heat sorse there to help draw it to a head. You can try popping it, and yes it will hurt. When it does pop or drain it will feel much better and will then go away. Please go see your OB, if you are concerned, or if there are real changes to it. PS... There are no stupid questions.
JUST WATCH IT AND MAKE SURE IT DOESNT GET BAD OR MORE COMES UP. SOMETIMES THEY JUST COME UP FOR NO REASON.