Legal action against manager or colleague if feeling PTSD

I am BE graduate passed out in 2011. I got job in one service based MNC in 2012, after sometime I got one project while I need to go client location ,client was one product based company ,manager lied to me its an automation project and I also got attracted joined but after joining the project in some time only I felt like contractors (me) are treated like untouchables here, where no client location guy will talk to you(contractors) properly and literally I felt like a slave. I was sitting in a room where almost 30 guys were sitting among them 2 were contractors me and one more colleague who was my mentor from same organisation was such a pathetic guy that he was not interested to share anything ,not ready to help at all, we had one verbal fight and after that he was almost not talking to me. Now there is nobody to talk and get help because I was also scared to ask to client team guys because of their behavior and I was fresher also ,then from that day itself I feel scared, traumatized and stressed .Initially 3 months I was not able to understand what was happening it was extremely pathetic environment .After 3 months many times that thought came to mind that I should ask for release but stopped myself because thought only 3 months are completed , and I was hesitant also to talk to manager because he will many ask many questions why you want release only in 3 months so ignored that thought and mind was so stressed out that I was not even in condition to talk properly to anybody ,Whole day I was sitting and not talking to anybody even after reaching to my PG also. After some more time I started visiting psychiatrist because I was feeling very weak and feeling like something weird was happening with my mouth, palate or tongue,I was finding so difficult to speak only. I was waiting somehow to finish the project and come out from that environment. Meanwhile I thought to resign sometimes from the company itself but till that time I had not learnt anything, That project got over in 9 months and after that I have visited to many doctors from psychiatrist , speech therapist to dentist , ENT etc .. everywhere in Bangalore to find solution of my articulation issue because my tongue sticks to my palate that sensation is very painful ,my mind is very much strained I find it difficult to hear sounds like s , c,x,sh,ch and this feeling is 24*7 . Every doctor says there is no physical problem and they can’t do anything .I have taken antidepressants for quite some time .I am struggling with my life day and night and I think I have not slept properly from almost 4 years. my life is getting worse every day. I have researched on internet so much, I am not sure its actually a PTSD .I am leaving Bangalore in December end and going back to my native(UP) don’t know what to do . Ques -->Is there any legal action could be taken against my company ,manager, colleague or client location guy because it has not only spoiled my career but tortured my life ??