Ttc but not sure how much longer I want to keep doing this

So we've been ttc since oct. We've been using Clomid every month. And I did end up with a BFP but I lost it shortly after. Anywho, right now by the time Id have a kiddo my daughter would be 3 yrs old. I don't want a large age gap between my kids bec from my own experience I was never close to my sibling bec we just didn't have anything in common (we're 4 1/2 yrs apart).  So, how many of you have a good relationship with a sibling 3+ years older/younger than you? Have any of you stopped ttc bec the age gap got to big between kids?  I guess I'm just getting frustrated that nothing's sticking. With my daughter we only used one round of clomid and got Prego the first time. So, idk what's up. Also, my OB told me there was nothing else she could do bec I'm ovulating normally. :,( my hubby has a low count and poor swimmers.