EWCM but period is already late???

Hello! So my period was due on Sunday and I have gotten negative tests before my periods due date and then one day late so I stopped testing. Yesterday I had creamy CM but today its heavy heavy amounts of EWCM. What is going on any ideas? I dont think I am pregnant because all tests were negative? I do have a history of cryptic/suprise pregnancies and an ectopic pregnancy.

Side note is I am sick so I have been taking mucinex sinus max.

Symptoms in case it matters:

- odd on and off shoulder pain

-on and off lower right side cramping

- minor nausea