When do I graduate to my OB?

I just had my second BETA and I’m pregnant!!! Finally LOL. I’m scared and now I have to wait until 6 weeks for an ultrasound 😫 do I graduate to my OB once I have a good ultrasound 🙏🏼🤞🏼?? I’ll be a little sad to leave my RE. He’s amazing, but graduating is also amazing!