Anyone get a period but still be pregnant? Please read description

Hi ladies so i know this is confusing I'm going to try and make it as simple as Possible so:

November 25- 27th i had my period normal

Leading up to my last period (December) i was shocked and disappointed i got it because i was sooo confident i was pregnant based off my symptoms. Anyway,

So i get my period December 27th- 29th

I had unprotected sex December 31st

NOW it's January 10th ( 9 days after unprotected sex) and I'm having prego symptoms:

Extreme heartburn

GAGGING!! SO BAD

light light cramps lower pelvis area

Raised heart rate

Headache, dizzy, fatigued

Alot of watery CM, so much that i thought i peed myself

SO It seems that all my symptom's line up for 6 weeks pregnant when i google them, and coincidentally, if i DID get pregnant in December like i thought, I'd be 6 weeks and 4 days, so I'm kinda curious now if it's possible my last period wasn't a period? I need to take a test but I'm working for the next 10 hours so all i can do is think about it lol. According to my calendar i ovulate tomorrow.

Has anyone gotten a "period" but was still pregnant?