Anybody have trouble conceiving #3? looking for advice

Hello! I have been off the pill for 6 months now. Hubby and I are trying for our third child. My cycles have been all over the place from quitting the pill and because I weaned my 18 month old from the breast about 3 months ago. My last three cycles have been 49 days and this last cycle was 34 days. I have never charted before up until a couple months ago. I've used opks and we've bd every other day except period days for 3 months now. I'm getting worried that something could be wrong. Are there any ways to boost fertility? I know I have been obsessing and stressing more than I should.