Wrong or who cares?

Just ended a 4 year relationship with my child’s father and going on a date Thursday 5 days after the break up.. we’re probably going to have sex, my ex bd never cared for sex and I have a high sex drive.. is it wrong to move on this fast? I don’t want to or plan to get back with him at all so should I wait longer? I did love him, it actually broke my heart when we broke up but he also wanted it to end. So I just don’t want to feel like I’m a whore.