Ditto what Reha said.
It all depends on you ability to forgive him, as well as your expectation of whether he should forgive you for the same level of transgression in the future.
As for calling off a wedding, I’ve got two friends who called off the wedding a month before and everyone applauded them for their courage. It’s easier to get over and out of a broken engagement than to get out of a marriage.
The best advice by far from someone above, pause your wedding planning and think about things. Do some soul-searching and talk things out with him and your family - don’t rush into a decision either way.