I'm 22 years old. I've been losing my hair for 5 years. I am using Minoxidil topgain usp2% (Photo)

If you have genetic balding, there is no cure to "stop" it.  If you want to explore other treatment options such as Propecia you need to see a doctor.

Given your young age, and the extent of your balding, it would be wise to wait many years before ever considering a hair transplant. In the mean time I would suggest 5% minoxidil over the 2% as it is more effective. The use of finasteride would also be very important. PRP and laser caps are other options in addition to the medical therapy just listed. Ultimately though, yours is a complicated situation and you should seek out a well qualified hair restoration doctor as soon as possible.

You are very young to have such accelerated hair loss.  I recommend you see a hair transplant specialist right away for a comprehensive plan of treatment.  I also strongly recommend you consider PRP and cellular therapy to help you.  You will also likely need transplant in the future.  

From the photos, it appears that you are well advanced in your balding pattern and you must get to see a good doctor now. Treatment of extensive balding will not respond very well to minoxidil alone. A good doctor will make appropriate recommendations.