Guppy- Butt Problem. What is it?

I would try the english pea remedy, just in case she's having trouble moving things along. Hope she will be ok. Keep us posted.
 
I had a couple platy that would do that after giving birth. Most would go back in but I did lose one or two from the prolapse. Clean water and peas will help.
 
You're so welcome, Chris.
 
An update:
She's in the 2.5 and she hasn't shown signs of the "prolapse/parasite". Her belly is getting big though. I'm guessing she's pregnant again. :) That's a good sign!
 
I had a betta that did the same thing, but it went away after about a day.
 
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