2 Periods within one month can this happen?!

Melissa • Keeping my faith
Well i know i have started my af again. I spotted light then it got dark! My normal cycle i bleed for 8 days but this last cycyle on oct 7 i bleed for only 5 days. I didnt get my af for September only oct. I normally stress alot but i have been stress free lately! Is this even possible?