Im worried.....

OK so my period was on the 1st-5th....

Yesterday my bf and I had sex was fine then went to the herbal store to purchase this tonic by the name of Lydia pinkham Ive taken it before to help get pregnant. It help me twice once 3urs ago with my son and then a yr ago with my second baby but I mc in June... But my question is after I took it I felt crampy and last night I could not sleep very restless and now I'm experiencing a uti... When I went to pee I had light pink discharge. Can a uti cause spotting ive had previous uti's but never have had spotting???? Input plz