Re's can help enormously,do not waste any time...I can only tell you that a close friend age 45,5 just had a beautiful baby...Good luck!!
I concur w/adgal - an re is your best option at this point. Fertility's a funny thing after a certain point and there's so much that can be done to help things along - good luck!
If you are 45 and have been trying for 2 years, you need to get yourself to an RE right away. They can do an evaluation and discuss your options with you. Best of luck to you.