Officially 9 days late!

Symptoms : nausea (gagging a ton throughout day), back pains, loose stools, VERY slight cramping.... all been lasting for almost 2 weeks now

I’ve tested once at 7 days late and it was a bfn :(

Not really sure when or if I even should test again because I’m so afraid of getting my hopes up..

How can you tell if this is just from stress or if I might actually be pregnant?!

ALSO, has anyone had the same symptoms and ended up with a bfp?

Thank you in advanced!!