Show a picture and tell what kind of plant you have (auto , photo) I can't tell by weeks old because if the light wasn't right or temps it won't grow as fast.
trimming the bottom leaves don't make the top grow, marijuana wants to grow conical shaped so in a auto plant (fast) you top at 4 nodes for photo 6 nodes and bend the branches down to expose to light LST (low stress training)
By topping you made the plant get bushy makes more growth then more bud.