If you convert a chapter 13 bankruptcy to a chapter 7 will this further affect your credit scores?

Yes converting a Chapter 13 to a 7 will further lower your credit score. It will show up on the public records section at the begining of the credit report. Once as an terminated chapter 13 and a second public record showing the filing of the Chapter 7. Each public record reduces your score.

You can potentially be discharged from a Chapter 7 sooner and that's will be the time the clock will start ticking to eventually make it disappear from your credit report which I believe is 7 years for most derogatory entries