All I can say is there are so many variables as to why TTC can be challenging, and sometimes it can take a while to rule any of them out, and sometimes it just takes time full stop.
Unfortunately there is no easy way to handle the wanting except as Sarah said, to try and focus on life as well and remember not to put anything on hold while you wait for the bub to come along. Thats the only advice I am prepared to share with regards to trying to handle the waiting part
Good luck with GP.