I also have been trying to get pregnant for the last 6 months. Its very frustrating. Have you exhausted all options? Do you know when you ovulate? And if you don't mind me asking do you use any kind of lubercant because that can slow down and kill sperm?
Hi! Well it depends on your age, the younger you are, the longer you can wait but it it still wise, after 1 year of trying, to talk about it with your gyno, if he/she doesn't recommend something (maybe Clomid which is the 1st reflex of gynos faced with difficulty conceiving), then it's up to you to take it to another professional.
My advise is: follow your instinct. What does your gut tell you? If you think that there might be a fertility issue, you must pursue answers and solutions. If you are a patient and laid-back person, then relax and wait...
Just my 2 cents...
Good luck!