Retroverted uterus

Hello, I have a question about having a retroverted uterus.. just found out I’m one of the 20% that has one. iv read that it doesn’t affect fertility but iv been trying for a year still no luck. Can it be caused by endometriosis or mainly genetic? Just tying to rule things out. It may decrease chances of getting pregnant by 5% because it’s a little harder for the sperm to swim up! Any advise would be appreciated!