Hand Foot and Mouth Exposure

Found out today our two year old was majorly exposed to HFM last night. This is extremely bad timing, as I’m currently 12 weeks pregnant with a high risk pregnancy.

What are we looking at in terms of symptoms and are there any supplies we should be stocking up on before it hits? We’ve got Tylenol and Motrin, but are there any must haves for HFM?

Also, Google says incubation is about 3-5 days, but are kids contagious before that period?