No credit card required
Browse credit cards from a variety of issuers to see if there's a better card for you.
They could but it probably depends on your LO. You might want to just ask them.
How old is the debt? Is it only on EX or the other CRAs also?
If you know it is yours you could call and ask for a PFD but it could take them up to 90 days to delete.
Oh. I would say that depends on how much your score dropped due to the CA being added.
There is a mortgage forum on this site. You might ask this over there. I don't want to give you bad information.