Hi, doxielover05. Welcome to the board!
One thing to try is rinsing the eye with Sterile Saline. It's cheap and widely available at department stores, pharmacies, even grocery stores. It will help wash out any irritants that may be causing the problem and sometimes that's all that's needed. As long as there's no pus it's probably safe to wait a couple days till Friday to have it vet-checked, but don't wait too much longer than that if the problem continues.
It's not too unusual to notice gunky eyes after a surgical procedure and that usually clears up after a day, so what you saw two weeks ago was probably normal and not related to what's happening now.
Oh, and once things settle down for you, we'd love to see some pics of your dachsund!