irregular periods


so for the past two months i have had irregular periods which is weird for me because this is the first time that its been super irregular. i’m on birth control pills i’ve been taking them for like two years and i started them to make my period lighter because before taking them it was super heavy and painful. i don’t know if its taken this long to finally make my period this light my friend said it was a possibility. last month i had super bad cramps the feeling i normally had during my period and really really light bleeding, sometimes none. then on the last day i just randomly started bleeding HEAVY but just for an hour. this month now i am having the same feeling i have when i am on my period but no bleeding and just a lot of clear discharge in the place of my period.... i am super confused because leading up to the past two months i would always have my period with 4-5 days of bleeding