I'm freaking out!! is this normal?!

I'm very early , like MAYBE 4 weeks.

My doctor usually doesn't see me until the 8 week mark.

He had me come in today , and do an ultrasound - he couldn't see anything, not even a sac. So he sent me to another office to have blood work done , and they're going to call me within two hours. this is going to be the longest 2 hours of my life. I'm seriously in tears. This is my fourth pregnancy and nothing like this has ever happened.

Im hoping it's because I'm so early, and that my levels are fine.

I've been testing every day since Tuesday and the line seems to gradually be getting darker.

Has this happened to anyone? please tell me I'm not alone. 😭😢