I also have a very light period, 2-3 days, and the pill did not affect the duration; it might have gotten a little heavier, but that's it.
I have not had any moods swings or weight gain. My bf thinks my boobs got bigger, that's it, lol.
My bf and I used condoms for about 5 months, and then I got on bc pills. I feel much safer on the pills; plus, we can have condom-less sex!