Implantation bleeding.. progesterone suppository

Hey guys my husband and I have been trying for about 2 years. 2 months ago I had a chemical pregnancy. I started seeing a fertility doctor, trying to do everything as natural and possible for now except they have been giving me progesterone suppositories after ovulation. On my day 21 I noticed very light brown discharge with some light cramping but then it went away. Yesterday and today day 24 and 25 I noticed some more brown discharge with a slight drop of red. I am on the progesterone suppository and typically my period doesn’t come until I stop taking them. Could this be implantation bleeding? During the month I had my chemical pregnancy I did get brown discharge on day 26 right before I got my bfp. Not sure what to think