Menstral Cycle

I have been taking Buspar since September last year and gradually noticed my period comes later than normal every
month since about 4 months ago.
i have always, since i was 10, had a regular 29 day cycle. now its anywhere from 31-34 days. i also get worse cramps on the first couple days than i ever had in my life. but the plus side is my period is shorter, as it used to be 5-7 days long. now its about 4 days long.

i was just curious if this is happening to anyone else? or if i could be something else health related.