Just so you don't miss these pages in particular (GL can be a little overwhelming to the new person)
http://www.guinealynx.info/mites.html
this one has info on mites, and links to treatment. (using Ivermectin)
http://www.guinealynx.info/ivermectin.html
This link is a bout Ivermectin
http://www.guinealynx.info/dose_calculator.html
This is a dose calculator, perfect if you don't trust your math!
Remember with mites, they may not be obvious, but stress brings them out, treating them as a preventative measure is always a good idea, even if they don't have them!
http://www.guinealynx.info/reproduction.html
This is a copy of the reproduction thread again.
To the left, you will see these links:
FAQ Labor Ovarian Cysts Links
Make sure you read them over too!
The links one has the info I was talking about in working to reduce the risk of Toxima. FAQ will answer a lot of your basic questions.
I would set aside an hour to two hours every day until you catch this all up. Also make a contingency plan for if your sow has problems with the babies. Start looking for a good vet now, find out what the fees are if you need his services, who you can go to in the middle of the night etc.
http://www.guinealynx.info/vet.html
This is good info for finding a vet.
This is a lot of responsibility for a person of your age to be taking on, but I am sure if you take the time to do your research, you will get through it. Lets just hope if she is pregnant, that everything goes really well!