@Logicfest -- No, that is a problem best left to a professional. No matter how good you are at home repairs you are, you really don't want to venture into something that serious unless you absolutely know what you are doing.
The good news is that most people who are professionals when it comes to foundation repair will be able to assess your problem and recommend a solution for either a low cost or no cost at all. Getting professionals to produce estimates is par for the course when it comes to such issues.
If you are going to pick a professional, make sure to get a recommendation or two from friends or family. A good foundation repair company will even suggest using a sealer if that's all you need to fix your problem rather than doing the "hard sell" so you will pay for a repair you might not actually need.