Is doctors office pregnant test always accurate???

Ishali

So i saw some bleeding just 4 days after ovulation. I wanted to ask Dr. Why that happend. So I went to her she did my pap smear and told that she dont know why that halpend n that I need to go back after 2 weeks for ultra sound. She also did a urine pregnancy test ( looked just like we get it in dollar tree) n test was negative. i taught i just ovulated last week isnt it too early to test ? I broke down crying cz i have trying for months now n taking pregnancy test really scars me I get sad looking at negative result. What should I do ? Believe her or wait for my period to arrive. My Af is due on 25th. Please anyone with any information about this please share. Please. N pray for me to get pregnant soon. 🙏 THANK YOU IN ADVANCE.