Maternity: When will the pain in my breasts stop?

I am 26 years old. I gave birth to a baby girl five months  ago. Prior to giving birth, my boobs started really getting big. They had already started during the first month but nothing too serious. Towards labour, they got bigger and bigger. My cousin told me they would go back to normal maybe two months after birth but it looks to me like they are just getting bigger. I am normally a c -cup (which isn’t that big) but now, getting a bra that fits me is a hustle. It’s beginning to depress me as I now struggle to find what to wear to work and I can’t keep on wearing my maternity clothes. What is going on? Will I go back to normal? I’m really worried.