My sister had her period started on 13 April - it was just normal bleeding for 3-4 days, from 6th to 14th day only spotting or just a bit more than spotting. Day 15th to 17th day have seen clots in her pads. 18th to 21 day - spotting / or a bit more than spotting. The period has not stopped yet. Would there be a problem if periods go for this long? FYI No pains anywhere. Vaccine 2nd dose taken on 06th may.