Okay so as embarrassed as I am I smoked for the first 3 months of HRT

BUT I have quit and I don't even get urges. When I smell smoke it grosses me out (Idk what happened lol)
ANYWAYS, just curious if anyone's experienced similar things. I've had breast growth since October 31rst (first time I felt my tiinnny breast buds and one month on hormones) Well now my breast buds/breasts have gotten larger and more tender. Although my nipples have been more sensitive than I could have ever imagined I never really got breast pain, and if I did it wasn't bad. My question is, since I stopped smoking on Tuesday, every night since then I have had really bad and intense breast pain. I'm assuming it's because I quit smoking and I'm in my fourth month?