Hi I ve just started the pill after being on the injection for two years, this is my 2nd period since starting the pill, I m just a bit concerned about a very sticky clear substance that was on my tampon , I put it on a bit of tissue to have a closer look and as I went to pull it off it was quite hard it was like latex glue, is this normal should I see my doctor about it, plus my period pains are very painful this time.