Follow up to piggie gets brown stuff on shirt

Question
I know you gave me an answer to this before, but I am still worried. The brown stuff is sort of watery, and its not a stain you can wipe off, you have to actually wash it out, and the yellowish stuff (which has gone) was a bit like snot in her butt hole. Can piggies be on heat a 4 months anyway?

I'm sorry if i'm being paranoid but i'm quite worried about her.

Answer
Okay, I think I have a better picture of what you're talking about. But first, to answer the question about being in heat a sow comes into heat 14 to 18 or so days. Some longer, some shorter. No they would not be in heat for 4 mo.

The stain you're seeing is most likely old urine stains, then they sit in their bedding and the coat gets a dark stain on it. Most of my sows that have white bottoms have the same thing. And you're right, it takes a bath to get rid of it.  

Can you take a picture for me? That would help even further.