Congrats on your BFP! Hope you will have a very happy and healthy 9 months. I am a Check success story as well, due to deliver later this week.
A word of caution, don't freak out if they cant see much right away. I had very fast rising betas in the beginning as well, and was brought in for first u/s at 5 weeks. They could not see anything definitive and even the u/s tech remarked that it was too early (despite Cooper's policy) - I sweated it out over the longest weekend of my life before going back at 5 weeks 3 days and by that time they could see the gest sac.
Good luck and keep us posted!