Chemical? 😕

I was 8-9DPO yesterday (decided not to track this month), took a test and there was a little baby line. Took several through the day and it stayed. Then took a FRER last night and it was blazing. Got up the morning and took a FRER and it’s a VVVVVVFL. Still there but nothing like last night. I am so scared this is a chemical. We’ve already had a miscarriage and 10 months later, possibly this. What does everyone think? Should I be concerned?