Could it be white-line disease:/ If Gallop or anyone else knows about this please help me out!?

It's been rainy and muddy around here in my horses pasture. I've been trying to pick out her hooves even more frequently than usual to prevent thrush or other disease to the hooves. Today when I was picking out her hooves the area near the bars/seat-of-corn/white line (it was a triangular section in the groove of the hoof) started chipping when I was picking out the grooves of the bar. It was white underneath when It chipped and the white line, started getting more pronounced as I cleaned out the hoof. Alot of junk was coming out of there, but the white line continued to stay brown in color. I'm concerned. The farrier came out and trimmed them awhile back, but she's due for another trim later on this month. When the farrier came (she hadn't had REGULAR hoof care before this so I didn't know what to expect).I had to pull her shoes off myself, and I was worried that I hadn't helped her make the transition as well as I should because I wasn't experienced in those things. Her hooves were completely healthy though.. only thing the farrier had to do was trim her front toes which had gotten long. There were a few ridges in her hooves that he couldn't rasp out (too close to the coronary band). He suggested I put her on horseshoer's secret to grow the hooves out so he could rasp out the ridges quicker. He had said that she had early stages of laminitis in her hooves.. she was FAT before I got her, and has lost a considerable amount of weight, now she's in perfect shape. He said that we wouldn't have to worry about this because it was almost definitly from when she was a fatty, and there wasn't much fibery tissue there:P I have been giving her baths lately.. to sooth her from the flies and mud. She's been getting the horseshoer's secret everyday (the exact amount it says to give her) and she also gets a small scoop of safechoice horse feed with that. These amounts were all recommended by my farrier. Since it's so muddy, the grass hasn't had alot of progress.. so she still gets hay, and she picks around on shoots of grass out in the pasture too. She hasn't been ridden much lately, and now I don't know if I should ride her. She can walk/trot/canter without any noticeable problems. Could this be early signs of white line? Or am I over-reacting.. and it's just a little chipping? Trying to get the farrier on the phone.. but I was wondering what ya'll think I'm up against:/