Multiple periods?

So I am 23 years old, taking the pill and this month has been super weird when it comes to my period. I got my period from March 24-28th. Then i got it again April 8-12 and then started again this morning. I know I’m not actually getting my period 3 times this month but I’m curious if this has ever happened to anyone else?? I took a pregnancy test after I got it for the second time and it was negative. Wanted to get some input before going to the doctor. Thanks!!