Orgasm tips

So sex with my husband is great. We've always had great sex. But the thing is I can only orgasm when I'm on top of him and lately it has been taking me forever :/ he says I try to hard to orgasm and I need to relax more. I think he's right and I also think I might need to find another way to orgasm. Any tips? I think I only orgasm on top because I can control the pace and the angle hits my clit just right, but I want to discover another position so my body doesn't get used to this one. Has anyone else had this problem and how did you fix it?