taking loestrin 24 to control symptoms

i just started taking loestrin 24 to control symptoms I was having at the beginning of my period (bad cramps and nausea). I am new to taking birth control. I spoke with my dr. about wanting one that would not affect my weight as I am trying to lose weight and actually had lap band surgery 5 months ago. I started loestrin about 3 days before I was supposed to get my period, I've only been taking it 4 days but it seems to be effecting me in the fact I seem more tired and a bit bloated. Is this normal and will it subside. Also I had been cramping prior to starting it because I was due to start my period and I am still cramping us this normal as well and will it go away? I just want this increased weight to go away as I know it can't be real since I haven't eaten to much and I do 6 kickboxing classes per week.