First off: Welcome aboard, you've come to the right place. The help available here is top notch. I speak from experience, here's the proof:
too-cold-for-algae-wrong-swamp-to-sparkle-in10-days-50-t55062.html
I was in my pool today to vacuum.
Read some posts that sound like they describe the same symptoms you have. See what their cures were, and what problems they had in common. To get a handle on your pool, even temporarily until you replace your SWG, you've GOT to have a good test kit to know where your levels are. This will give you a starting point to know which way to go with what treatments, and pool school will explain WHY. I don't have a SWG on my pool, but I don't buy any chemicals (except liquid chlorine, which is just concentrated laundry bleach) at the pool store. I bought stabilizer @ Home Depot when I needed it, and clorox/plain old bleach where ever I could find it. I still have some old algaecide that I'll never use- because when I used it the first time it DIDN'T WORK. In the link above essentially all I did was add chlorine, *checked my chlorine several times a day to keep it above shock level* (why you need a good kit), scoop leaves as best I could without being able to see the bottom, brush the sides every once in a while, backwash the filter when the pressure went up 20%, then once it cleared up I added stabilizer. Part of the reason I waited on adding stabilizer was because I was out of the drops for that test. Another benefit was with the stabilizer being low, I needed less chlorine to reach shock level. The drawback was with low stabilizer, the sun burned off the chlorine faster. I was off work that week, so I just kept up with testing & dosing and I was able to stay ahead of it.
Read pool school but don't expect to understand it all. It takes some time, but you will come to "get it". I read it when I first got here, thought to myself "Jeez, I'll never get the hang of this", but I kept reading posts. After a while I revisited pool school and guess what- it made sense!
Stick around, ask questions as you think of them, and let us know how things progress!