Husband has abandon us. Advice please

Assalm..My husband has been chatting with that woman for quiet a time. I was not worried about it because itrusted him until I saw his messages asking that female to meet him. She had agreed to despite being married and has a child. There were already tensions at home and I confronted my husband telling him that I don't approve his relationship with that woman and to stop it all. He has continued to talk to her ans deletes all messages hereafter so that I cannot see. I was out of my mind when I learned about it and asked that woman to stop his relationship with my husband because she is breaking my home. She complaint to my husband and I had replied her on my husband cell phone. So my husband i did liked it and there were a huge fight at home. Its been 3 days since he has abandon me and our 2year old son. I eeally don't know what to do. I feel helpless, I want to cry but am too angry to cry. I cannot direct my emotions. Sorry for the long post.