TTC for 5 years. I give up.

My husband and I have been trying to conceive with our first child together since the night we got married. I have very regular periods. I do ovulate. We just can’t get pregnant. No we have not had any infertility treatments. I have a 15 year old daughter from a previous marriage. I guess I need to give up. Be happy I had my daughter and just give up. I’ve spent hundreds on tests and always get disappointed. I just give up.