2ww/ testing April 15.....

I recently had a mc in March & yep I'm back at trying very soon. I'm so desperate to become a mother & my husband & I start our little family. Crossing fingers this is our month. After my f/u visit last Thursday my OB says I'm clear to start again and levels are at 0. I also asked about the"waiting period" after a MC. She says that some OBs prefer you to wait a full cycle or up to 3 months for due date purposes, but I don't have to wait bc she can estimate my due date based off the size of the baby! How soon after a MC did you get your bfp?