Messed up periods

Betty

I stopped taking the pill back in March (end of March)

In April, May and June I had "normal" periods on the predicted times. Around the 18th-22nd of the month.

However in July and august I had two periods. One at the start of the month 1st-5th and again at 18th-22nd (approximately)

I'm currently on another period which would set me up for two periods again this month.

Is this something I should bring up with my Dr?