Can I really be preggo??

I'm a little in denial right now but here it goes. I'm 3 days late and had sex 3 weeks ago. I hadn't had any period signs. No cramping not painful boobs. I had a UTI 2 weeks ago and puting the cream on was more painful than the UTI itself! Now this week my discharge is really thick and creamy. Last week my mom made eggs for dinner and it didn't smell good to me but I are it anyway then ended up vomiting! A few days later she made some eggs again and I almost puked at the smell. Then today I had a tightness in my right ovary which I never felt before along with feeling nauseous at some types of foods. I keep telling myself maybe I'm just overreacting and that I can't be pregnant. What do you his think?