Is my chest going to get even smaller if I lose weight again (please read details)?

I used to weigh 135 lbs. and I wore a C-cup. I got down to 110 and wore a B-cup. I've been slowly gaining the weight back recently, but my chest didn't grow at all, and I'm worried that dropping 12 lbs to get back to my lower weight will shrink my chest even further, possibly down to an A-cup even though I'll be the same weight I was two years ago. Since they haven't grown, do you think they'll shrink?

I'm losing the weight anyway, but if I'm being ridiculous and don't have to worry, I want to know. :/ Any girls been in a similar situation?
Is my chest going to get even smaller if I lose weight again (please read details)?
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