Possibility of pregnancy?

Jacqueline

Period was due February 5th. I spotted a tiny bit on the evening of February 4th. Just on the toilet paper. So Im 3 days late. I thought I conceived on January 23rd but test is saying negative when I took it today. Wasnt with first morning urine though. Boobs are sore. Anyone go a few days after a missed period and still end up being pregnant?