Your past stays with you, and it can be received in a new way. Nichiren Daishonin wrote to the Ikegami brothers:

"The blessings gained by practicing the correct teaching, however, are so great that by meeting minor sufferings in this life we can change the karma that destines us to suffer terribly in the future."

Letter to the Brothers, 16 April 1275.

Chant today and let the weight of yesterday change its shape.