I add my voice the the ones who have already responded. Go to the ER now! I speak as someone who spent a weekend unable to sleep because of kidney stones who ended up on a vent because her lungs stopped working altogether! Fortunately, I was in the hospital by the time my lungs quit working so they were able to vent me. If it had happened at home, I wouldn't be here now. It can happen very quickly with MG and you can do nothing about it at home! Go in now!