Sorry to hear about your condition but I am glad that you are seeking medical attention for the same. Firstly the breast mass does appear to be benign by your description and you just need to regularly follow up with your doctor regarding that.
The complex cystic mass which was discovered recently on MRI
needs to be evaluated further and you need to visit a gynecologist for the same. The decision for surgery would only be decided after evaluating the nature of the cyst.
Hope you get well soon.