Is it possible😳

J • I want a Girlfriend for us 👫
So this is the second time.. My boyfriend and I have had out of this world sex and about an hour later I'm having the worst back pains.. First time it happened I kinda put together it could be sciatica.. But since then we have had unprotected sex he let off in me 3 outta idk 20x and I'm 5 days away from my period and I'm putting other things together and I think I might be pregnant.. Pregnancy does cause sciatica but since the first time the pain started I did have one period but it was after that period we had the 3 slip ups 😰 can someone tell me anything to make me feel better and not stress so my period isn't late cause of stressÂ