I have been riding the fence...

We have been TTC for 3 years next month and after 16 months of not conceiving at all I think I'm finally done. My hubby tells me he respects whatever decision i make. But I'm tired of POAS every time I turn around and it's negative. I take all of the medicine the doctor prescribes, do all of the testing, temp everyday, check my cervial mucus and get my hopes up everyday and for what??!! I have an 8 yr old daughter and he has a 7 yr old son both from previous marriages. We wanted a bay together but it's not in the cards I guess.