Feeling restless. How to overcome it.

For the past 10-15 days I feel restless and I get panic for no reason. All of sudden I feel restless and I start to panic in just few mins and I start to feel nervousness too. Whatever I do I am not able to come out of the feel easily. I feel very light dizziness and feel like I should rest. This feeling is troubling me a lot. It takes hours for me to get normal and sometimes I don't get nor la throughout the day. I feel like something bad gonna happen. I am not able to think anything else. Sometimes after this feel is over I feel relaxed and such a peaceful mind I get. I can feel the peacefulness to greater extend and again after few hours I start to panic again. I need advise. I don't want to share this to anyone else in my family. I don't know how to overcome it.