I am 22 years old have been taking birth control for five years n...

I am 22 years old have been taking birth control for five years now and have used three different brands. The first one that I was on was too low of a dose and after six months my body became used to it and my periods became irregular. After that, I took Yaz for a while and loved it but once I switched insurance companies, it was $60 a pack. I then went on to Loestrin 24. I have been taking it for a little over a year now. I have not noticed weight gain or an increased appetite but have had many other problems with it. There have been months where I miss my period entirely and then have a very heavy period or two separate periods in the next month. As well, I think it has made my skin worse and my PMS a great deal more noticeable. I often have unbearable cramping for two days prior to and on the first day of my period. Sometimes I have a "period" that lasts about 6 hours and is not more than just brown spotting on the Saturday before I am to start a new pack. Currently, I have missed my period the last two months and have had to continuously purchase and take pregnancy tests to be sure that I am not pregnant. My breasts/nipples are swollen and extremely sensitive and painful. I will be purchasing a pregnancy test today because I am unsure of what is going on. Suggestions for women looking to go on birth control: try other brands of the pill prior to Loestrin 24. Yes, it does give "shorter and lighter" periods...but often causes missed periods. I know that we all hate those days during the month where we feel like absolute crap and do not want to leave the house because of our periods...but (at least for me, a 22 year old student) I would much rather have that monthly reminder than to spend more money on pregnancy tests each month than I do on my birth control.