I've been on the pill (several different kinds actually) for almost 5 years now. I've gone through a few different brands as Ortho made me too moody and the generic of ortho made me break out. I have been on Loestrin for at least a year or two now and I've loved the little to no side effects and the very short, light periods. Within the past week I've had to switch to Microgestrin (generic for Loestrin) and have noticed a few changes. It seems to make me a tad bit irritable, but nothing major. The main problem (and question) I have here is while I've been on Loestrin I'd always get my period on the 2nd or 3rd inactive or brown pills. As I was finishing my pack I sorta screwed up and missed 2 doses. My doctor said to take the missed dose first thing in the morning and take the regular dose at the time I usually take the pill. So I did that and started the new pack of pills which is the generic and never got my period. Is this normal for switching or starting new birth control?