5 days late on my period

So my period is pretty much always on time every month. But i thought i was getting my period last week when i started getting minor cramps and spotted a tiny bit. But i was fooled because it went away the same day... I have been puking up this whole past week being which sucks and I've had headaches and very nauseous at times. I haven't took a test to see if I'm pregnant yet. i guess I'm just waiting to see what my body does. My birthday is on Christmas and the prefect present would be a BFP. But I'm also scared because i do have a double uterus and who knows what will happen? Any suggestions? Please