TTC my first baby...desperately.

Hello. I've been trying to get pregnant with my first child for the past 3 years and it has been with no success. I'm 35 years old and I've been checked out by my doctors and all results are fine. I have no medical issues that make it hard to concieve. My boyfriend has a 12 year old daughter so I'm not sure if it could be his sperm. I've taken clomid, fertility blend vitamin pills and prenatal pills. I've also done acupuncture since I heard that helps with conceiving and herbal pills. Can someone please suggest what the next step is? I'm depressed everyday about the possibilities of never having my first child. 😔