I have hip bursitis and take advil every 10k on a long run. Like you, I’ll deal with my hip after the marathon because I’m too stubborn to not finish this now.

Unfortunately, ibuprofen can cause bleeding. 12 hours into a 24 hour race , I had blood in urine. Tylenol doesn’t work. Instead I run with a compression sleeve on knee followed by a hinged brace. Yes, I can run in it and it helps.

Not running a competitive sports with a pain would be my advice. You need to learn to listen to your body. There will be other marathons and you’ve already had a jump start on your training for the next one. Take care of your health first. I know you are not interested in sound advice right now because it seems you are determined to run this marathon but hope you change your mind.