possible pregnancy????

So I ended my period on 12/13, I started the NUVARING the same day, I didn't know I had to wait 7 days before the hormones start to kick in nor I was told by the doctor. I had unprotected sex on 12/16, then on Saturday I started getting some of the side effects which are dizziness, nervousness, mild nausea, and a headache I also had this tingly feeling on my legs, then right arm and once in my face, I took it off for 3 hours and for those 3 hrs I felt like myself again. After the time was up I put it back in and within an hour I was already feeling dizzy.