Am I just anxious or pregnant ?

My boyfriend and I had sex on Nov 23 and today is the first day of my missed period. I haven’t taken birth control since before thanksgiving. My cycles usually last about 7 days and it’s been known to be a day or 2 late, but lately I’ve been gaining weight, feeling nauseous and a bit dizzy. I took a test yesterday, the 6th, but it was negative. I had similar symptoms when I was pregnant with my daughter but that was 4 years ago and I didn’t get a positive test until a week after my missed period. Should I test again or am I just being anxious about the possibility? Any advice would be extremely helpful.