Would you say it's easy to mistake breast tissue for a breast lump?

Sometimes: Sometimes a thicker area of breast tissue or dense fibroglandular tissue may feel like a lump. However any palpable lump in the breast needs to be evaluated by a health care provider to assure it is not a serious lump such as breast cancer.

It can happen: Please see your doctor. Given your age, breast cancer is unlikely. However, you need to find out what this is. After a complete history and physical, if there is a palpable abnormality, an ultrasound will probably be next, perhaps followed by a mammogram.