I am 24 years old female during my last month period I had breast pain for 2-3 days and that from last week in april I started noticing change in my right breast that it is little bigger than the other with slight pain for few days but after few days I do not have pain in breast but it looks still little big sometimes my other medical conditions to specify that I had low d vitamin and calcium so I took capsules for 3 months and last month after a blood test I got a low b12 vitamin and I took shots for that for 4 weeks as prescribed can you please let me know is dis due to any of the above reason or is there any reason and what can I do? Thank you.