something wrong with me or??? can't feel sex...

Okay so my husband and I have been sexually active for a while now and when I think about having sex with him and doing sexual things with him I obviously get turned on but when we start having sex, I don't feel what everyone else feels. Like it doesn't feel good? Like is there something wrong with me? I love him so I don't want to hurt him but I don't feel good when he's actually having sex with me... when he does other things like oral or other things, I do orgasm and feel good but once a finger slips on or he penetrates me I don't feel good. I put on an act and that's what I don't want to do. Help ):