Beginning of mastitis?

Mr

My left breast is in so much pain. I tried pumping because it feels so full but it didn't ease the pain. My left breast feels so heavy still with lots of balls in it. I tried massaging them out but they won't go away. It hurts just to touch my breast. I'm also starting to feel very warm and ill like the start of a illness

Could this be the start of mastitis? It's one of my fears 😞