What Are The Side Effects Of Long Time Usage Of Mercillon ?

hi ive been taking mercillon 4 about 2 and a half years and have decided 2 come of it ive just finished my last pill yesterday as i feel that it may be the reason 4 my mood swings and weight gain and possiblee panic attacks i feel like once i started taking this pill my relationship with my boyfriend has changed slightly im not the same carefree person i was b4 taking this pill r there any common side effects from taking this pill that ive mentioned?? thanks