Is there a bad start?(pics)-Advice Please.

[iAlex]

In the last 2 years I noticed my hair was getting thinner in the middle. I used a lot of hair products over the last 3-4 years like hair spray gel putty wax etc.The area that I mainly used the products is the one affected. Now I decided to have a shorter hair and I was amazed by what I saw. Do you think is because of the hair products used or is a start of an MPB etc. I am 20 years old btw with no MPB history in my family etc. What shall I do in this situation?Shall I cut it off completely and let it regenerate, hopefully?
Any advice will be appreciated.
Thanks