Long period normal?

Ever since I received my vaccine (June 2021), AND have been on a weight loss journey (-60 pounds since January 2021, workout 4-6x weekly) my period has been VERY inconsistent. I take my birth control perfectly every night too. Like it will be gone for two months then back or maybe one and on. My dr said that’s normal especially due to my change of physical activity/ weight loss. I received my period July 17, after waiting 2/3 months, and usually have 5 day periods, but now I’m on day 8. It’s not HEAVY but it’s a little lighter than light. Is this normal? Like since I didn’t have it for so long, should I not be worried for bleeding for this long?

Thanks in advance!