Sex position

So sorry if this is TMI for some ladies. But I just figured out I must only be able to fall pregnant when being on top. My hubby is very dominant in bed and doesn’t like being on bottom. I fell pregnant in that position with our first three years ago. And for almost 2 years we have been trying for a second and absolutely nothing. I suggested going on top to re-enact conceiving our first. Well yesterday I finally got a positive result. So does anyone else have positions they fall pregnant easily in like myself.