Thanks girls.

I put Jazz back on the boob at lunch time coz they were actually full and hurting. Maybe I'll just keep a couple of bottles of formula in the fridge and if I'm busy or stressed out I'll give formula to her then and let the supply build up. She did chuck a couple of times after having formula and also there were small chunky bits in her poo. Also, she's got like a rash/pimples on her face, I am wondering if maybe she's having a reaction to formula? Surley not as when she was in the hospital she was on half formula and half EBM until I was able to express more than they were able to feed her.