Yes, the sins of your forefathers can visit downwards to four generations. If we look into the book of Exodus 20:5,6 34:6-7, Numbers 14:18, Deuteronomy 5:9,10. These scriptures contain the following words; "visiting the iniquity of the fathers on the children... To the third and the fourth generations". The question should be what are the reasons for this and or situations that caused this type cursing to come about, because I am saved?
You are saved if you welcomed JESUS into your heart, this has nothing to do with your eternal salvation or walk with the Lord. It does has something to do with the enemy having a right to bring against you things that were experienced in some cases generations ago, you can take care of this with a little bit of instructions and teachings. Teaching on generational curses will be your search key.