Brief Answer:
It might be related to stomach hyperacidity caused by Tylenol and celebrex

Detailed Answer:
Hello
I had gone through your question very diligently and I really appreciate your concern .
Looking at your description, history of arthritis and medicines (Tylenol and celebrex) you are taking which irritates linings of the stomach and produces more acid in stomach.
So this pain in left side of stomach might be related to stich hyperacidity or acid reflux
Another possibility is indigestion, intestinal infection and other rare causes

Here I would like further information for better assessment of the condition
Since how long you are having this pain?
Are.you having symptoms.of acid reflux like bloating or heaviness in stomach?
Your complete medical history like diabetes or other metabolic disease
Are you taking any other medicines

In my opinion.you should take anti acidity medicines like pantoprazole or ranitidine group of drugs with antacids
Avoid fatty fried spicy an drunk food
Have lots of fresh fruits and vegetables and plenty of fluids

Please wrote back to me with these details so that I will be able to tell you more precisely.
Best wishes

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Brief Answer:
Have plenty of fluids

Detailed Answer:
Hello
Welcome again
I am glad to know that exact diagnosis has been established in time
Kidney stone generally manifest as pain in loin region and very excruciating pain

However I would advise you to follow these guidelines
You should take plenty of fluids, small stones can be expelled out in urine with hydrotherapy.
Please write back to me with size of stone and ultrasound report so that I will be able to tell you the exact treatment.
Please feel free to discuss further
Best wishes

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