Am I worrying too much?

I had my period October 30th - November 3rd, it was my first real period from stopping the birth control pill!

I did however have sex on the 15th, 16th, 17th and 20th and 23rd of October. It was protected, we used a condom and he pulled out before he finished. After sex we tested the condom by filling it with water to check for tears or holes, and there was none. This past week I’ve been sick with a stomach flu (nausea, and diarrhea.) but my dad was sick too and so was my bf. Could I be pregnant ? Or am I just worrying way too much? Please help :)