hahahaha I wish that was the problem..... in fact they are too big and somewhat smothering. No my problem is purely that there is not enough for 2 yet and yes they are gaining but the get formula too since they were premies if I could pump enough I wouldn't need the formula @saralois7
using a breast pump more frequently will increase your supply. The more you pump the more you will produce. To answer your other question, you will know, you'll leak and feel very heavy