Skyrim NPCs are attacking me for no reason

I need to go to Riverwood for a quest but every time I show up the NPCs start wildly attacking me (including ones with the little icon over them indicating they need to be interacted with). I don't know what to do. Please advise. I am on PS4 and not using mods, if that helps.

I know of two possibilities:

1. You commit crimes against them, this can be checked by opening your journal and under "Crimes" tab check your bounty in Whiterun which Riverwood is under. If you have any bounty then it is possible that you have committed crimes against them. This can be cleared by surrendering to any Whiterun guards and serving you jail term or a few other means.
2. You are a Starving Vampire, vampirism is split into four stages of hunger. By the time you reach the last stage and is starving for blood normally friendly NPCs will attack you on sight. This can be cleared by fleeing out of sight of NPCs and feeding. If you want to avoid getting a bounty for feeding you can consider feeding on bandits instead.

Old question, but I think I have an answer on how to fix.

The same thing happened to me: I traveled back to Riverwood and everyone in the entire town wanted to attack me on sight. The guards were also making off comments about how I smelled like I was robbing graves, etc. I am neither a vampire nor a werewolf. I have no bounty in the Whiterun hold. The only thing I could think of is that a bug caused some internal flag to be erroneously set that told the game I was a criminal. If this was the case then I'd have to find a way to somehow trick the game into resetting that flag.

So I killed a chicken on purpose in front of a guard. As soon as the guard approached with the usual "hey stop right there" dialog, everyone in the town sheathed their weapons and went about their business. I paid my fine, spend the night in jail, and was able to return to Riverwood without further incident.

According to this site, in the Bugs section, a few select NPCs will attack you for no reason. Namely Delphine, Sigrid, Alvor, Gerdur, and Faendal will attack. This is said to be due to a thief being in town when you arrive. Surrendering to a guard should fix this.

To surrender, sheath your weapon and try talking to them. Holding block should help if they won't talk normally.