Channel that rage into icy white glacial anger and make sure that every word you say counts.
If he tries to blame you for his infidelity by claiming that you pushed him away, give him a look of absolute disdain and contempt and say he'll now know what it's like to be pushed away because there's no way you'll get up close and personal with him again until he's been checked for stis.
Say also that, thanks to him being unable to keep his flies zipped, you will also need to be tested and putting you in that situation is hardly the act of an honourable man. Add that, as it appears he's not the man you thought he was, you very much doubt that you will ever be able to feel anything much for him again.
Let him have it with both barrels but do it in a very controlled way because you want every bullet to have maximum impact and deflate his ego.
Hold it together until he's left the house, at which time you can kick the shit out of a cushion or vent here.
Seriously, losing the plot because you can't control your anger is not a smart move. You need to be completely in control of the situation so as to convince him that he's not such a clever boy after all - and if he has been having it off with an ow he will be full of himself.
He needs to be despatched with his tail between his legs. Go to it, sister, - you can do this!