Too soon to be feeling symptoms?

I ovulated on Sunday (I'm pretty sure) and had sex multiple times that day with SO, and today I'm feeling kind of crampy and a little nauseous but nothing too bad. I've never had kids and this is the first month we have been TTC so I'm curious if it's too soon to feel pregnancy symptoms? I kind of feel pre-period crampy and a little irritable but my period isn't for 10 more days. And my cycle is pretty regular. Any information or insight is more than welcome :)