The other thing you should do before any mortgage inquiry is opt out of pre-approved credit offers. Why? Scummy collection agencies and junk debt buyers know that you cannot be approved for a mortgage with any open, unpaid collection accounts. So if you have a medical bill that you forgot to pay, you'll be forced to pay it in a hurry. And hell, even if you have other bills that may or may not be yours, or are out of SOL, or any other thing, you will have to pay them if you actually want that mortgage. Yes, this is a giant violation of the FDCPA, but you are not going to get anything fixed within 30 days under the FDCPA.
Opting out means you can't be shopped around by the credit reporting associations (equifax, experian, transunion) on their list of mortgage shoppers. You can opt out for 5 years here:
https://www.optoutprescreen.com/?rf=t
If you want a mortgage in, say, 6 months you should go get a single inquiry tagged as mortgage to see if anything comes out of the woodwork. http://quickenloans.com can do that for you.