The past?

There's no time like the present, sometimes I find myself questioning things that I have done wondering if I had've made the right decisions, but i guess i just gotta learn from the stupid shit i did and just make life better for my future. I always wonder if I should go back, or keep moving forward? I mean the past is the past for a reason right? But that doesn't always mean its meant to stay in the past, espically if its keep appearing in present time. Hmmmm damn idk