I need help!

Okay so I got randomly sick last night, and I mean hit and cold flashes without a fever, throwing up, headache, the chills, you know the whole nine yards.. it’s June 30th rn and me and my bf had sex June 26th which was a non fertile day for me, he said there was a chance of him not making it out on time and that it was close.. since it was a non fertile day, that makes there’s a very very low chance of me being pregnant… correct?