I have minor to severe arthritis on my back and my leg. What is the best way to cure /remedy this? I heard of Aspirin but I know it is bad for the stomach. What dosage should I take that will do the job but not hurting the stomach. What about fish oil. Please help

My 10 yr old yellow lab was just diagnosed with arthritis. She’s absolutely fine, most of the time, runs, swims, etc. But, she has days, when she can not put any weight on her right front paw. The Vet gave me medacam, and that works very well. But is there anything else I can do for her?
She is at her normal weight, about 62 pounds, she is definitely not over-weight. She swims in the pool daily (usually several times, even when the leg acts up). I do give her glucosamine supplements (in honey). I’m interested in the magnetic therapy, do they make small mattress pads for dog beds?
She;s definitely not overweight, and I dont think she did anything to the paw, because it hurt initially, but then was absolutely fine for about a month, and then back to holding it in the air. I was really beginning to think the arthritis diagnosis was not right, until she started limping on it again…I’m not that familiar with arthritis, is that how it is, comes and goes?

I can’t determine which of what I’m doing makes the pain go away for days after it attacks for few days. I do therapy but it recurred. I put warm bag/warm compress on my lower back now and I use some natural therapy cream made of ginger, virgin coconut oil and peppermint which seems to have stopped the pain so far. I don’t know if it’s just the nature of arthritis that it stops then recurs at any given time and I don’t know anymore whether what i’m doing now is the one that makes the pain stop.