is it ok to drink coffee twice a day? breasfeed mom here. there are times that i exceed more than 2?

My ob-gyn said that I can drink 3-in-1 coffee and still limit my caffeine intake because that'll be passed on to the child. I steer clear from brewed coffee although I do take soda once in a while. I don't notice anything different though I don't take too much caffeine. Don't want to risk it.