Self cleansing

So lately my ex hit me up, checking up on me but I just totally blew him off because every time he comes back into my life something bad happens. And now I just have so much negativity in me. Like I’m just so sad with no valid reason as to why. I woke up and had scary ass dream of a bombing near the beach. Does that even mean anything or am I bugging out. Is there anyway to self cleanse. I was just reaching a point in life where I was comfortable with myself but now I feel like I’m back to day 1.