Puss Lump on breast

My breast has been sore the past couple days and I just noticed this lump on my breast and it had a head to it so I squeezed it and this thick green puss came out with some blood. There’s still a large lump but I can’t get anymore puss out. What should I do? I’ve had sepsis before and I’m worried cause there’s blood in it that I will get it again. Also my son has been vomiting a bit more than usual and crying all today and yestersday and his belly is off. Has anyone had anything similar? Worried it’s also gone into my milk and that’s why he’s like this 😭😭😭