Trying to stay positive!

My partner and I have been actively TTC for the past year and a half. And nothing 😐! I feel I've done everything but stand on my head at this point. I was to the doctors back in March to talk about my period as it has become irregular. My period use to be very regular before I went on birth control. Then we we decided to stop taking precautions and I went off birth control my period has never been the same! my doctor wasn't concerned and said to keep trying and come back in 6 months if we hadn't got pregnant. I have a doctors appointment next, anything I should be prepared for?