Ladies I need assistance!!

Ok so for the last 8 months I haven’t had a period. No I’m not pregnant, TRYING to but clearly the lack of period was preventing me lol

Anyways my family dr put me on birth control to see if it would bring on my period and help with the whole hormone thing and not getting a period. Well....it came....DAY THIRTEEN lol I’ve NEVER in my life had a period that lasted so freakin long!! Usually it’s 5 days, HEAVY bleeding but never this long. Anyone else have a similar experience? Could it be from not getting a period so long that it’s lasting longer this time?