First off, buddy, educate yourself. You really need to read or learn from an experienced powerlifter the basics of training. This site is an enormous source of info, so use it.
Second, you're a beginner. Even with three months of doing that program you are a beginner. Yeah, you've been doing that program for 3 months and it gave you gains, that's fantastic. However, don't try to reinvent the wheel any further. Go with programs that are proven to work. Stronglifts is a fantastic program for beginners AS IT IS, I followed it myself and vouch for it. 5/3/1 is also a proven program.
More than strength, more than gains, what you learn from following a proven program is something much more valuable: Discipline. Learning to stick to something that you know works, even if you get bored and shit or your eye is momentarily caught with the newest routine on fitness magazines, is probably the most important lesson any lifter will ever learn.
There is a time for experiments, my friend. The beginning is NOT THAT TIME.