Talk to Gynecologist on Menstrual Cycle

I have never had any irregular period in 14yrs but this was my first time this year in April that I kept bleeding for 17 days with the average heavy flow that I normally have on the 1st & 2nd day. The flow was less this time on the 1st & 2nd day but then it got a little heavy (average heavy flow) for like 12 days and ended after 17th day. Now it’s past 19 days (I normally bleed after a cycle of 19 or max 21 days) but this time it’s late for 20 days (excluding the ovulation cycle of 19 days) and there was no pain. I dont know if it’ll help or not but I had come back home after 2yrs of hostel life and only 1 menstrual period after being home was normal and then this started. I just got married but my periods had already started and was ongoing at that time so pregnancy is outta question. Please advise if this is normal for a girl who never had any irregular periods or that I should immediately go for a check up or wait and see if i get it in like 7 days (next menstrual cycle starts withi