Welcome to the forum
First, you shoud recheck the pH and if it still tests low, use borax to raise it to 7.2 to 7.5 ish.
Since the strips are notoriously inaccurate, I'll ask you to take a water sample to your local pool store to have it tested.
Then report results back here.
Also, take a sample of your well water and ask them to test for metals.
You don't need to buy anything from them on this trip.....
If you haven't already, you should start reading Pool School - button, top right.
Tell us more about your pool - size (gallons), equipment, etc.
We'll help you get your pool all sparkly and clean :-D