My breast feel heavy and one is bigger than the other and it seem to be growing more?

There is no reason: one would get bigger unless there is an infection. In that case the affected breast would be tender. It could be a small cyst in one breast make you feel like it is getting bigger. If you have gained weight or taking bcp your breat can get bigger. Someones one breast could be bigger than the other and it could be perfectly normal. See your doctor if you thing something going wrong for an exam.