Did Tamoxifen help with your cysts?

I have always had cysts...big ones, small ones...at one point I had 13 in one breast and due to a cyst I had another mammo and that's when they found my tumour.

I've been taking tamoxifen for 8 months now and I've got a huge 4" cyst in my good breast...and a few small ones in my bad breast...except now I can't say or take for granted that they are only cysts. I thought that tamoxifen might help or prevent my body from making them??? I see my BS next week