Any advice?

So long story short my now husband (then fiancé) got pregnant back in October 2018 but had a miscarriage at 6 weeks. We weren’t trying at the time but obviously we’re so excited when we got the news. However, we have now been trying for 6 months and no luck. I have semi irregular cycles (anywhere from 28-33 days). I have been doing Ovulation kits with no luck and we have BD every other day each cycle. I’m so confused because we got pregnant so easily last year but now we’re having trouble.

Any advice on how else to increase our chances??

TIA!!