Nervousness, Palpitations, Vertigo, Fear, Cowardice

Im unmarried, 33 yrs old.
Please, Please help me. My life is getting so much effected. All the below mentioned symptoms are chronic.

1.I get intimidated my anyone whom i think powerful.
2.Whenever their is fight or a conflict coming up with a powerful person, visit to dentist, interview, I feel very nervous, heart pounding, restlesness, fear, legs tremble.
3.However no fear of animals, night, alone or anything except fear of heights.
4.If a syringe is inserted immediately i feel vertigo, i sweat, vision becomes blurred and i feel like fainitng and someone has to support me and make stand and i feel no strength in my legs
5.If i see a wounded patient being treated in hospital, i feel same symptoms and i feel like rushing for fresh air.
6.Poor memory, I am unable to concentrate.
7.Every time im thinking, so much over thinking.
8.Low on confidence, unable to take initiatives.
9.Whenever there is fight or a conflict, prior to it i feel so confident but when the times comes i feel so nervous, so restless, heart just pounds as if it will come out.
11.If the person whom i fear comes suddenly in front of me I get into a paralyzed state.
12.If i perceive someone as powerful den i act cowardly
10. I had heavy indulged in masturbation but now i had quit.
12. I go to gym and do have a strong built but inside i feel very weak.