Hello. Based on the history you have given, it might be due to muscle spasm of chest muscle due to your physical activity, applying pain killer gel and taking some rest will itself get you some relief. But you should also know that brest pain can also occur in mastitis,cyclical pain,breast cysts, breast trauma, prior breast surgery or other factors localized to the breast. Breast pain may also start outside the breast... in the chest wall, joints or heart.Cyclic breast pain appears to have a strong link to hormones and menstrual cycle. Cyclic breast pain often decreases or disappears with pregnancy or menopause. If you are still concerned kindly consult a nearest surgeon for further management.