Yes, use 1 on 1 time talk to manager, ask a raise.

HI Johnny,

Now I have worked in your team for 3 months, you know how good I am.

Based my education, my ability of handle work and deliver high quality result, and consider the hour I worked everyday with so many overtime hours, I would like to see a raise of my salary to $Nk. OF course I need your suport and approval, this is the reason why I am discussing with you right now.