You should change a new set of valves. You have to take the valves out to wash, normally they are fully detachable, including the membrane if you are using medela ones. Take note to dry them in a place that is not humid, mold grow at humid places.
Cough and runny nose have nothing to do with the mold. Probably she caught a cold. There was once I found mold at the cap of my bottles but baby is fine but if you have enough milk to spare, it will be better to throw them out to reduce the risk of getting infection.
Read more