I am 20 years old and get my birth control through my university ...

I am 20 years old and get my birth control through my university health center (it's only 15 bucks a month). Im not having sex now and have not in QUITE some time as my boyfriend and I broke up almost a year ago. I have been on birth control for three years now and NEVER had any problems. Since i get my meds through the school they give me what they can get in. I had been prescribed solia when i first started taking it and it was perfect. I had shorter periods, NO cramping, barely any weight gain if any at all and it even helped with mood swings during my period. This past month, the center got in Loestrin 24 and that's what they gave me. I am VERY pissed about it. I started taking it and within days could tell a difference. I would cry for no reason and the slightest things upset me. I was cramping all the time. I missed my birth control ONE day and made up for it the next day, BUT i also got my period. That was two weeks ago. I have not missed another pill and i STILL have my period! I am cramping irritable and just a downright bitch, and that is NOWHERE near my normal self. Im the type of person to let most things roll of my back in time and just go with the flow. Im glad I got on here and found out im not the only one having problems.