19 week old red sex link who is sick/weak like.
		
		
	 
	
		
	
	
		
		
			Monday she was acting the same and was trying to separate herself from the rest of the flock, she was also sluggish/moving slower then normal. Tuesday morning I started treating with Corid. This morning she had got on the nest and after almost 2 hours she finally got off and when I went and checked for an egg, there was no egg but beside the nest box was a very light yellow substance (it looked as if it was the contents of an egg all mixed, kind of like a raw scrambled egg). Since then she has gotten worse and is acting weak, either standing or laying in 1 place.
		
		
	 
	
		
	
	
		
		
			But I am pretty sure I figured it out. She has worms. Whenever I got back from buying calcium citrate, I immediately went to check on her, noticed she had yellow poop on her back end, I was trying to clean it off and found a flat white worm, it was probably about an inch long or so
		
		
	 
Please get photos of the worms?
It sounds like these are Maggots instead of Roundworms.  
Wash this girl up really well, see if there's maggots infesting a wound hidden around the vent or just infesting the yellow poopy butt. 
If there's Maggots, then you need to get those off asap with repeated soakings in warm soapy water, pick them off with tweezers if necessary. 
This time of year, warm weather and poopy butts - you can end up with Flystrike (Maggots) in a hurry, they can do a lot of damage and make a bird very sick or they can die. 
Get the Calcium into her.  If you can't find Calcium Citrate+D3, hopefully you can find some TUMS at a store. Give her 1 TUMS daily for a week. 
You found what looks like egg in the nesting box.  She may have soft shelled membrane that she's trying to expel or another egg on the way.  EXTRA Calcium is given in a crisis to help the pullet or hen expel egg and egg material.  Calcium with not interfere with the Corid.  You can deworm at the same time as well, but make sure you are not dealing with Maggots!  Safeguard will not treat them!
I would also consider giving her an antibiotic is she's not responding well and has yellow poop.  Amoxicillin is a good choice.  You can order it online. 
https://jedds.com/products/amoxicillin-10-powder?_pos=1&_sid=bf6f88dcf&_ss=r
Safeguard Liquid Goat dewormer is commonly use to treat most worms (internal parasites) that poultry can have. (NOT Maggots).
Dosage of Safeguard Liquid Goat dewormer is 0.23ml per pound of weight given orally once daily for 5 days in a row.  NO Repeat. 
	
		
	
	
		
		
			I went to my local store, all they had was safeguard for goats. I won't be able to go out of town again until Sat or Sunday. Do you think the safeguard will be ok?