Plus size TTC with first

Casey
Hi ladies! I'm 24 and my husband and I are TTC for our first baby. Started doing the BD according to ovulation in October and still all negatives. I'm 5'9" and weigh 275, wondering if this is hindering us? My doctor and gyno didn't seem too concerned about my weight because I'm healthy. I just feel like so many people get pregnant without even trying and I know you can't compare your journey to anyone else's, but it's tough! 
Any advice?!