Hi, I'd like to help you with your question.
It sounds like you may have some self esteem issues. Is there any abuse in your background? This could also be a cause. Sometimes, people who were abused as children develop an oversensitivity because of the strong emotions involved with abuse.
Self esteem issues can be dealt with relatively easily. You can try working on it yourself and see if you are happy with your progress. Here are some steps you can take-
One, identify when you feel most sensitive and upset. What is going on for you? What about the situation upsets you most?
Two, pay attention to what you are thinking and feeling. Identify the thoughts and feelings. Write them down. See if you can see a pattern.
Three, once you know what feelings and thoughts come up for you and when, work on changing how you react. So for example, when someone says something that hurts you, stop, identify what you feel, then practice letting that person know you feel hurt. Use a calm voice and tone. Say how you feel in a simple sentence or two. Then stop and let the other person respond. Know when you have a very strong reaction to someone that the feeling is about you and how you feel, and not necessarily about what is being said.
Take a deep breath when dealing with your feelings. Repeat it to yourself often- "Relax, deep breath, it's ok."
Be aware of what you were taught as a child about yourself and what you continue to believe. If you were always told that your opinions and thoughts were not worth anything, then identify that feeling now when you feel upset.
Learn to pinpoint when you start to get upset and if needed remove yourself from the area until you calm down. Then go back in a deal with it.
If you feel that making progress on your own is too difficult or you feel it is not effective, then seek out a therapist. Ask your doctor for a referral or if you attend church, your pastor can help. You can also search on line at http://www.find-a-therapist.com/.
There is also a book that may help as well. It is called The Highly Sensitive Person's Survival Guide: Essential Skills for Living Well in an Overstimulating World (Step-By-Step Guides) - by Ted Zeff and Elaine N. Aron. It is available at Amazon.com or your local library may have a copy.
I hope this has helped you,