Negative tests/ Negative test at my GP

Brittany • 28 years old, married 2016 -together 8yrs. Baby #1 08/17/19 Baby #2 on the way :)

So I’m a week late for AF as of today. I had a urine test done at my regular doctor, the results were negative. I’ve tried several HPTs from different brands, and each one was also negative. I’m never late, so I’m sure something is going on. I have an appointment with my gyno in March, which is the soonest appointment they have. I’m honestly so tired of getting AF/negatives every month. Is there any chance a blood test might be better? 😔