Yes sore boobies are a side effect. It is because of the hormones. With your body feeling like it is in menopause the hormones returning and or fluctuating causes your breast to feel tender and sore, kind of like during puberty.
Many women will experience pregnancy type symptoms when coming off depo. Tired all the time, nauseous, heightend smell, weakness in joints and achiness, numberous headaches, breast tenderness as well. Sore breast are a big one and one many mistake for a pregnancy symptom and then they get their hopes up
As soon as you have your charts started please post them so we can look them over with you!
My last chart was an annovulatory cycle, and I am waiting to see if I am gonna O this month or not.