partner is not backing me 100 percent.

I am 49 and hoping to get pregnant. I have one son who is 22 years old. I've never wanted a second child until now that I realize I will be approaching menopause soon. All these years past I didn't want to have another child out of marriage, I wanted to do it the moral way. But I never got married hence I didn't have anymore children. But now the clock is ticking fast, and I told my partner I'd like to try, he is afraid of the risks. And I am afraid that when we have sex he might sustain from ejaculating or take some other means to prevent me getting pregnant because all he thinks of is the risks involved. I don't have any health issues. And I have been taking prenatal vitamins, CQ10, DHEA, vitamin D, folic acid, stopped drinking, eating healthier, having less stress. Last month we had intercourse just two days before I was ovulating but I didn't get pregnant. I am wondering if his sperm count is low, but I know I can't ask him to take the necessary actions on his part because all he sees is risks involved. I am afraid he might hold back when we have intercourse. I can't leave him and meet someone else because that takes time getting to know someone, falling in love, then becoming intimate and I don't have time, any day now I could stop seeing my period. What should I do?