Hi My Problem Started When I Was Enjoying A Giant

Hi my problem started when I was enjoying a giant swing ride with that tingling sensation in stomach, suddenly I got so intense fear and panic feel like I can't take this feeling anymore and I even tried to jump off but couldn't and I completed the ride anyway and I was OK. After some days I was returning home from metro and as I was looking outside suddenly I got this intense fear feeling but this time without a tingling sensation in stomach, I feel like running away I thought I'll be fine if I get out so I got out in a station but no I still was so afraid I feel like detached from reality, shaky hands I thought of all the reasons why I should not be afraid of but nothing work so trying to calm myself down I took a cab and went home took a nap thinking I'll be fine after that but no now I started to have an irrational fear and tension feel like going out and running but why and from whom? It was 3 weeks ago since then I have this irrational fear like when we are far from home and we hear our parents are not doing well we feel tension and don't know what to do I have this feeling for no reason like three times a day but even when I am not experiencing I keep on worrying about that and it's all getting worst now I am afraid of trains and have developed a fear of buildings too I can't go up high I feel intense fear. I haven't been to any doctor and no medication, I can see a little improvement in me this days but still I need help. I am 23 male.