Credit Setback-Huge Drop

[Ryan Johnson]

Hi, Bigger Pockets. 

I spent the last 2 years working with a credit relief company to repair my credit score. My credit was finally in great standing and I was pre-approved for a mortgage. I continue to monitor my score and early this week my credit was hit with $150 past due that I was unaware of that drop all 3 scores by 100 points. I paid the past due bill and have the relief company working on removing it from my credit. The scores will take several months to return to the previous numbers. 

Any ideas how I should move forward with my investment plan before the scores rise?