Just turned 43 and TTC.

That’s me. I’ve given birth four times and lost numerous pregnancies. My last baby was in 2006. They’re all grown and out of the house. But I remarried, and my husband doesn’t have any kids and wants them. I have regular periods and I’m pretty healthy. I definitely don’t look or feel my age. Are there any tests that you would recommend that I get? I’ve heard about some kind of dye test that you do to your uterus to check your fallopian tubes and all that. I’ve been trying for three months and my partner is 42. I’ve been taking supplements like folic acid, and several other that I heard that are good to take when trying to conceive. Any advice would be helpful and appreciated ! Is IVF my only hope?