Hello ladies

Sooo.. I'm 9dpo today. Took a FRER Friday around 245am (Technically Saturday) I got vvvfl.. However, I was preparing my sons party yday and had been up and running around all day long. While at his party I started having real bad lower back pain (Right side) I of course googled when I got home and saw it was a symptom of having a chemical pregnancy. (Why do we ever google ?) anyways, took a dollar store cheapy today the ones like the Walmart .88 ones and it was negative. So my question is. Has anyone ever had lower back pain and turned out to be pregnant and everything was OK? I also went to my OBGYN Friday and she done a culture swab and drew blood to check progesterone and after I left there I was having lower back pain as well. Ugh! I have yet to take another test because I'm scared of it being negative. TIA ladies! ?