I am in the same boat, except I am a little older. I will be turning 39 in a couple of weeks. If it weren't for TTC I wouldn't mind getting close to 40 one bit, but since I'm TTC each month I just feel like I'm running out of time.
I have been through everything to improve myself fertility wise. I've had a lap that showed that I didn't have any endo or adhesions, and I had a small polyp removed during a hysteroscopy. My doc couldn't get the dye to flow through my right tube, but it looked perfectly normal and healthy so there is a good chance it is not blocked.
We will have been trying for almost 2 years come November and none of the things I have done to improve myself have worked, so now we're just starting to focus on hubby. His SA was borderline, but I had always dismissed him as "the problem" because we were able to conceive dd and he has three children from his previous marriage. His morphology was 0.5%, which my RE did not think was a problem, but his motility was only 30% when ideally it should be about 50% and no lower than 40%. The actual volume of his semen was great, but the concentration was at 20 ml, which is at the low end. My RE expected that he should have gotten me pregnant after a few months even with his borderline results, but now I'm questioning that. We had visited another RE for a second opinion who felt that hubby's sperm was dreadful and that it would take years and years for us to conceive.
The frustrating thing is that nothing has changed with me since I had dd and my delivery was very uncomplicated. I still can't believe we've had so much trouble. I'm hoping that since his results are more borderline that changing his diet and taking supplements will improve his sperm enough to get me pregnant. His diet is just atrocious so if anyone can be helped by supplements and dietary changes it's him.
I have done everything possible to improve my fertility, and no one has found a reason why I can't get pregnant so it has to linked to hubby. I feel so desperate just typing this...