Hello there
I am only 26 But was takin microgestin 1/20 for about two years. I did have heavy periods before bc, But not as bad after my first child was born. Last summer i was switched to Loestrin 24, Basically its the name brand but there is 24 active pills and only 3 days of placebo pills instead of the 7 that your gyn is saying to skip. Well i dont skip any placebo pills and i didn't get my period for about 3 months at a time. When i do it is usually for about two days and its very light, sometimes barely enough to use tampons. My best friend is also on it she is 23 and hasn't had a period in five months.
The issue of sex drive.... I haven't noticed any difference. I started it right after my ex moved out. So i really wasn't in the mood too much. But have been dating a wonderful guy for 5 months now and don't have any problems with my end of the sexual relationship.
Hope this helps!