I'm 6 months postpartum and have been taking this pill for 4 months now, the first month I had a period, the second I had a light period and these past 2 months I've had no period at all, I spotted a tiny bit last month and that's it. Is that normal on this birth control? Other info, I am breastfeeding but only at night time and I do have regular unprotected sex, I've skipped a few pills because I have bad memory, I still get cramps like periods, just no bleeding. Thanks in advance!