HELP !!!!!!

So me and my s-o. Had sex . we used condoms but only condoms they didnt look to have any breaks or any leaks but now I'm feeling wierd . nauseous ,achy in my lower abdomen, dizzy , and my nipples are sensitive . its only been a few days. But is there a chance I could be pregnant? I dont ovulate for 4 days but I'm also having a lot of wet discharge . im just courius if I should be worried we aren't ready for kids . BTW my period doesn't start for another 18 days . any help would be appreciated. Be blank and honest please .