This is rape. You said you didn't feel like it, and he pinned you down and forced himself inside of you. You shouldn't have to fight a man off of you to not be anally raped. It's a classic date rape scenario.

It is worth getting a rape kit at a hospital and filing a police report. It creates a record, so if he was to do this again (which he will), it will show a pattern of abusive behavior. So even if you don't think anything will come of it, that record is still there as evidence.

I don't know what weed has to do with anything, unless you're running some sort of illegal weed business. If you're worried about him saying "she smoked weed with me"...that literally means nothing unless a cop is searching you and finds weed.

In my honest opinion, I think you should report him. Don't let anyone try to manipulate you into believing this was not a legit rape.

Also, let's take a second to think specifically about the degrading nature of men having anal sex with women. It's specifically a choice to choose the form of sex that's less pleasurable and more painful when we have fully functioning vaginas that were made to deal with penetrative sex. Additionally, women don't have a prostate gland in the anus like men do, which is extremely pleasurable...virtually a male g-spot. Anal sex is a big part of BDSM and porn that revolves around degrading women. He chose that act because he wanted to dominate you, to the point of literally raping you.