PLEASE HELP!

Sydney
Y'all my husband and I have been trying for a baby, somewhat but not faithfully. We had inercorse on Friday night but right after I felt nauseous. Then Saturday it was a little worse but not too bad and started getting dizzy spells! Today I feel worse, my throat is sore, I have a small headache, body aches, nauseous by every smell, dizzy, and stuffy nose. I saw that it could be signs of pregnancy but I didn't know if that was true or not or if anyone else had the same symptoms! And I know it could also be just a small flu bug! PLEASE HELP! Thank you in advance!