I have a sharp pain in my left breadt around the nipple. What is it?

Hello and welcome to EmpowHer,
Sharp breast pain can be related or non related to the breast.
Sharp breast pain that is related to the breast can show up regardless of your menstrual status.
Causes can include:
-- oral contraceptive pills, hormone therapy, and other medications.
--lack of support from a proper bra for women with larger breasts
--breast injury,
--any type of breast surgery - (augmentation, reduction, mastectomy or reconstruction) - the affected tissues will hurt after surgery and as scar tissue develops.
-- Cysts and fibroadenomas may grow and press on adjacent tissue, causing regional breast pain.
-- Near your nipple or beneath it, an abscess may develop or milk ducts may become clogged and infected, resulting in mastitis or ductal ectasia.
--High stress levels - you may feel sharp pains in your breast, due to tensing nearby muscle groups.
-- Breast cancer rarely causes sharp pains in the breast

Sharp breast pain not related to the breast include:
--ostochondritis is a potentially painful inflammation of the chest wall cartilage and bones.
--Bronchitis is a painful inflammation of the airways that lead into your lungs. The pain of bronchitis is worse when you cough or try to strain for breath, but it can feel like breast pain.
-- lifting, exercising, or bending improperly causing a pulled muscle in your chest wall, a rib fracture, or back pain - all of which may feel the same as a sharp pain in your breast.
--potential heart attack

With sharp breast pain, you can listen to your instincts. If you only had the pain one time, then it is probably not serious. However if it is reoccurring and/or you have other symptoms accompanying the pain, you should see a doctor.
Below I have pasted a link that talks about the benefits of primrose oil for breast pain.
https://www.empowher.com/diabetes/content/benefits-evening-primrose-oil
I hope that helps.
Faith