He suddenly pushed me away..

Hi, i am 26 yr old, female and i met this guy online. We started dating and have been in a relationship for the past 4 months. I know 4 months is too soon but everything was going good. We had conflicts on some issues which we tried to resolve. We were starting to get serious and considering this to turn into something long term. I have had a traumatic past with relationships but my greates strength is my family who support me whatsoever. But for him, he was in a relationship with his ex for 7 yrs and they broke up 6 months ago. His relationship with his parents is also not that great. Last week, he suddenly said he was feeling guilty about his previous breakup as his ex posted something on social media which he thought was about him. I asked him to speak with her and get a closure. They spoke for 3 hours on a video call. I wasnt around coz we r in long distance. He called me the next day and said he had a mental breakdown and felt overwhelmed and said everything was too much for him. He almost said everything that could push me away from him. I cried and tried getting him back, offered support but he wasnt listening. We both said some difficult things. Now we have decided to not talk for next few days and left the things at "lets see where this goes".. my fear is what if after a few days he decides to not give this another chance? He also said both of us have some unresolved things, i dont know why he said that. Is this the end? Should i be prepared for no msg from him even after waiting for the next few days?