2 years trying to be pregnant

Doodi
Hi every one ..
​My english is not that much also my grammar so just try to understand what I want to say ;) 
​2 years am trying to have a baby I don't know what's the wrong all the test was fine nothing wrong in me or in my husband  . Before 3 or 4 months I do the test and have weak pregnant then I lost it :(
​I feel stress and so sad I want to make my husband happy . I do't know if there any position to help or anyway to help tell me I'm so tired am trying not to give up  ,
​Or  how many times I do the sex in one day?