Thoughts?

So I came off birth control 6 months ago. My period has been regular every 28 days since coming off. My last cycle was 42 days and now I’m currently 6 days late. I have all the pregnancy symptoms but keep testing negative. I have cramps but no period. Super tired, headaches and nausea. I went to the obgyn today. They did a urine test came back negative. I was very sensitive during my pelvic exam. He tested my thyroid levels that came back normal. I have ultrasound scheduled for sep 9th. He wouldn’t do a blood test to test for hcg. I really feel like I’m pregnant. What are your thoughts? Do you think I’ll do the ultrasound and find out I’m pregnant during that appt?