Oh my gosh, I am so sorry for you, I could not stand to have my period for that long! Heck, after like 2 days I already can't stand it. I would definitely recommend the pill. I know there are a lot of stories of women gaining weight and feeling sick, but in studies, I know for the weight gain aspect, women on the pill did not gain more weight than the control group of women off the pill. I have heard girls say that they "gained 20 pounds the year they were on the pill", but that does not prove any kind of causation, they may have gained the weight pill or no pill.
I personally have only really had the positive side effects of the pill, those being clean skin, skipping as many periods as I want and no weight gain or sickness. Every woman reacts differently to different pills, so I do suggest you give it a try, because you may not experience any negative side effects at all, and if you dont like the pill you can just stop taking it.
Good luck!