I wear a bra every night when i sleep.. can this cause my boobs to be sore to the touch?

Probably not: There are pros and cons about wearing a bra at night. Over time, it might keep your breasts more perky / less droopy. But wearing a bra all the time can also interfere with the body's lymphatic circulation / drainage, such that environmental (cancer-producing) toxins can end up accumulating in the breast's fat cells. But making them sore to the touch? Probably not. Perhaps estrogen dominance?