Terrified

Hey so I’ve been breast feeding my now 2.5 year old she always favoured the right breast leaving my left one to often get mastitis … i noticed a few lumps just before christmas so went to gp and she felt and said most likely mastitis advised me to stop feeding so they could feel my normal bresst tissue not feeding tissue i also got put onto antibiotics and told to wait a few weeks and come back if still concerned. I finished the  course and still feel the lumps. So i went back to gp today and seen a different doctor I explained to her i get a burning sensation all over the booband stabbing pain towards my nipple area she felt and said lumpy and also completely ruled out it being mastitis and wants to send me for a scan. Breast cancer runs in my family and im so scared. Ive since today noticed 2 of the lumps feel very different than the others. Im 26 years old and terrified