Pregnant maybe?

So last weekend me and my bf decided to use absolutely nothing during sex. No pull out, no protection NO NOTHING. I was suppose to get my period three days later but never did. I'm late as of right now but only two days late. I've been having stomach pains over the weekend ever since he finished inside. Bad stomach pains that just ended today. And today I just feel pressure and overly tired and little achy. But not what I feel when I'm gunna get my period. I took a test before we had sex that night.. Only bc alcohol was involved and I'm very cautious about that stuff lol. I wasn't (obviously) but how soon can I try another test? And what do ya think?