When to see the doctor..

Jennifer
AF due this week, but already feel like it's coming on. I just turned 30 (husband is 29) and we have been TTC for 8 months now. I know they say some couples take even up to 14 months or more... I guess if something's wrong now I want to start getting help. My doctor originally said to call and we would meet once we hit a year. My question is, can I request tests to be done sooner? Help! What are your experiences?