I'm 2 and a half months pregnant with my second and still nursing my first, who is 17 months. My breasts are really sore…

I'm 2 and a half months pregnant with my second and still nursing my first, who is 17 months. My breasts are really sore and I know its a part of pregnancy but this is my first time having sore breast since I didn't have it with my son. Between 5 and 7 weeks it was horrible, I stuck it out and it soon got better. Now 10 weeks going on 11 its to the point I hold my breath when he latches. I want to try tandem nursing I'm not sure I'll make it, will it ever get better?!