How does the credit check works when buying multiple properties?

[Xochitl Cadena]

I am buying my first property, but had a deal that didn't go through in Aug. One of those banks checked my credit twice one week apart! Now my credit score decreased so I would like to know how do other investors do it so that the credit score is not affected? My broker is telling me that I have to wait 2 years before I can refinance or buy another property. And I read in my credit report the hard credit checks stay in my report 3 years!