Starting to Think It won't Ever Happen

Well I don't know how to start this off but here goes. I had a misscarrige in 2012 with my first child an then 3 months later I became pregnant again with my Little Girl now an had her early Feb 2013 (C-Section) I had an Incompetent Cervix that lead me to getting the Cerclage. So now as of 2015,2016 an up until Now we been trying to get Pregnant an has yet to happen. But what I think is the problem is I need to have more Sex but when I tell my husband to have sex on my Fertile Days he gets upset an days I feel like I only want him for sex an I'm like No that's not it. But he says it feel like an Job so now we have sex maybe 3 to 5 times a month. So I'm praying an asking God to help me out but honestly I'm starting to think I won't have anymore kids. An I got a checkup an I been doing what I was told an my results Plus my husband's came back as normal. Maybe it isn't my time to get pregnant my husband just started his new job so I'm like ugh... But to all the other Mommy's or Ttc Mommy's out there I'm praying for you Ladies. If anyone Feel Like me then please comment. Thanks