Extremely faint positives, 4 days in a row. In need of advice!

Has this happened to anyone else? I tested on a First Response Early Response about 5 days ago and it was COMPLETELY negative. The next day, a faint positive and the days following that as well were faint. Even this morning was EXTREMELY faint. Has this happened to anyone else and they've gone on to get their BFP. My biggest worry is a chemical pregnancy. I'm praying so hard that this is my Rainbow Baby. 💜

My period was due January 10th and it hasn't shown and I have lots of early pregnancy symptoms.