Does Taking Fertility Medicines Cause Brown And Pink Spotting?

Hi i am on fertility meds. i started with my new cycle 20.01.14. i drink, Stamino Grow (1 morning; 1 at night) folic acid, 1000mg Glucophage in morning and night and ecotrin. on day 5 - 9 i drink Fertimed and 1 day a week Dositnex.my ovulation was on day 14 (02.02.14) (confirmed by ovulation test kit) i had to start period today but its not as normal, usually my 1st day is heavy and then lighter from there on. today there is just dark old blood coming out with a little pink inbetween, mostly now only when i wipe but this morning it was a little more. can this be due to the meds?