Last yr i was on yaz. after 4 months i started having bizarre and...

Last yr i was on yaz. after 4 months i started having bizarre and unlikely side effects because of an allergic reaction from yaz. I went off the pill for a few months and now im taking loestrin 24. I've been on it for 5months now. I have experienced spotting but that has decreased with time as i've been on it. I am now realizing that i might be gaining weight from this pill. I've been going to the gym almost everyday and have lost no weight, instead i've gained. last yr i never went to the gym and weighted less. This makes me think its the pill thats causing the weight gain but i'm not sure if this is true since i've been on it for 5 months and am just now noticing my weight.