Just finishing up my 4th week on my herbal regime including PM.

What I have seen so far and what others have noticed is definition in both breasts from fat production in them.

Once buds start forming (hopefully within the next 4 weeks), I am planning to incorporate an exercise program to help with support the new breasts that are forming.

Will keep the forum updated with my progress.

Sounds like a good start, don't forget to record measurements and take photos. It will help in future if you try to take pictures at the same angle each time.
I hope you do get budding within the 4 weeks but it may take as much as 3 months from the  start, so don't get too despondant if it takes longer than your hoped for 4 weeks.