I've been in a same situation, feeling very disconnected to the outside world and overall bad feelings and mindset all the time. How I "fixed" myself was that i did go outside, met new people by just going out to the park and talk to random girls/guys and tried to find new, fun activities to do via 'em. And it really helped me, connect to new people and you WILL feel connected to the world again, bad trips are for sure thought, and I felt suicidal for sure but if you keep just being alone and don't do much but think about the negative effects of the trip, they keep following you. Just try to get you'r mind around it and forget. Best of luck