Advice please?

Hello,
​I've been TTC since Jan/Feb time, and no luck. Due to my partner's work schedule we're mostly only able to have sex at the weekend, although there have been some exceptions (and some weekends we were unable to). At first I was very blasé about it, but as every month goes by I get more and more worried that there's something wrong with me. For the last couple of months I've cut my alcohol intake to almost zero and cut back to one cup of coffee/tea per day. I've also started using OPKs and it turns out I'm ovulating earlier than I thought- around day 11, not day 15/16 of a 30-day cycle. I'm 29. Any words of wisdom?