Confused 🤷‍♀️

Today I am on cd7 of my new cycle. I have a niggling feeling that something isn’t right but also not wrong 😊 Here it is... My boobs swell up a lot a night and my teeth are very sensitive (these were my symptoms in my last pregnancy which unfortunately ended in a mc at 9 weeks) My doctor says that it’s possible to have a period and get false negatives in the 1st month and that time will tell. Most tests give a BFN. However today I noticed a vvvl.

Any ideas ? Anyone with a similar experience or is it the dreaded blue dye ? My cervix is high and very soft, it has been like this for 2 weeks. Baby dust to everyone ✨