Your story sounds just like mine

My husband and I are 26, just started trying (last month was the first try), my family is really fertile (my sisters and mom said they all got pregnant basically on the first try every time), haven't told anyone really in case it takes awhile to get pregnant, and I'm constantly talking about it to my husband and got the same response as you

I'm sure that is how a lot of husbands think. I think if you're not charting or any of that stuff the best way to know when you are ovulating is by paying attention to your CM. I ended up buying the ovulation prediction kit (just those strips) online at
www.early-pregnancy-tests.com and that definitely helped in determining when I ovulated last month. Unfortunately I didn't get pregnant but I ended up ovulating early than what I thought I would and by using the tests I was still able to catch it.
Good luck in TTC, I hope you get pregnant on your first try

!!