How much will pulling my credit hurt the score?

Two months ago I tried to purchase an house but my credit was about 12 points below. The lender told me what to do and I've done most of it. There were wrong items on there they were deleted and I've paid my credit cards down and I'm anxious to see where my credit stands now. I was using credit karma to monitor my credit but its showing my credit isn't moving at all now but they're trying to offer me cards. I've had my credit pulled a couple times when I bought a car which was in the win down period and for the mortgage should I pull it or let the lender do a rapid score and how long should I wait?

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