Slowly losing my mind..

My son is 2 weeks 3 days old. In that time I have had a cold, dealt with my 3 year old having a cold, trying to get my 3 year old to sleep in his own bed (which I failed at already), had my newborn catch a cold, found out he has a yeast/diaper rash, thought his umbilical cord stump was infected... it fell off last night and still some goop on it. The only way I get sleep is with my newborn on the bed with me, my 3 year old on the other side of me, and my poor husband on the floor. We all have to share a room right now and let me tell you, I'm going fucking nuts! I need my 3 year old in his own bed, without waking my newborn every 30 minutes ughhh! Why did I do this to myself?