Is anal sex ok as a Christian?

In the contexts of marriage, is anal sex ok to have? Can you please back up what you feel with scripture? I've asked 2 pastors. 1 said anything goes in marriage, and the other said anything but anal sex. My husband and I decided to try it, and it felt really good, but I felt guilty afterwards. Then again, when we first got married I felt guilty thinking sexual thoughts because I had tried not to for so long. I can't tell if I'm feeling conviction, or just overreacting because of the stigma that can be attached to anal sex. Any thoughts are appreciated. Thanks!!!!