Help or advice would be appreciated

I feel like I will get answers here.. so my “period” started 18th of this month but was dark brown all day when normally I start af and few hours it becomes bright red however the next day it was a normal period with clots :( but the “period” has only lasted for 3days and hasn’t been extremely heavy like my normal af and today is the 3rd day and it has gone so really I’ve only had 2 full days of full bleeding.. has anyone had a situation like this and still turned out pregnant yes I know it is rare and unlikely I have ordered a pt but I just want to know if this has happened to anyone it may just be me really wanting my rainbow baby but my cycle has NEVER been this off.. many thanks xx