Lightning vs Braxton vs Contractions

I'm serious frustrated about this! I have no FN clue which is which! Yes I get the tightness of my upper belly which I assume is Braxton. Yes I get sharp electrical shock in my lower pelvic region with out the abdominal tightness which I assume is Lightning. And only occasionally do I get tightness in my lower abdominal where it feels like my entire belly is being pulled into my uterus but it's not painful. Nothing is regular but & I only get any of them after I'm active. I'm 39wks & 3days. I just don't know what to look for or which one I should time.