Am I going crazy?

Britt. • I`m going to lay it all down.. I`m 20, in a long term relationship; I`m trying to conceive!
Well, my little one is 5 months old & has started teething really bad. (He's been teething, for a while now like 1 month) His symptoms & things have increased or changed a bit. So the drooling has increased, shockingly not! Well in need to fill in some gaps, I gave my son organic applesauce the other day in a fruit teether. (I usually give him normal gerber applesauce, but thought to try the organic target stuff) Ever since I gave it to him Wednesday, he has had a rash on his bottom. But there has become green mucus looking poop, almost every changing has had some type of skid marks in his diaper, he's breastfed. But today is Saturday, and he's still pooping at every changing & having what looks like boogers in his diapers. Now I drink nothing but lemonade or Gatorade unless I'm drinking water. His diaper tonight looked like it may have a micro speck of blood in it. I don't know if it was from pooping so much, or from the butt rash on is bottom. I've been using destin or bordax (however you spell it) & ocassionaly some vaseline. Now is the poop, diarrhea & everything from teething? Or could it be from him having an allergic reaction to the frozen organic applesauce, and the lemonade I've been drinking, with all the acid in it causing this? I mean I have been drink the lemonade for a long time and never had this reaction, but the acid could trigger something else! Thanks for the help