Period

Ok so I’m the pill and im the last week of the pill and I got my period. I normally wear pads but I wanted to try tampons for a change. Ok so normally my cycle last 5 days even since I’ve been on the pill. I got my cycle Wednesday and today I tried to tampon I don’t know if it wasn’t in all the way or if I had it too far but when I went to take it out there was a little pain. Ok so when peed it was back to its normal color idk if my body is still adjusting or if I did something wrong Idk and I’ve been on the pill for about 3 months now