Sharp pain in side while running, recurrent

I run 2 to 3 times a week with high intensity. I've been doing this the past couple of years without the aforementioned issue. It started about a couple weeks ago, but I can't finish even a mile anymore without a sharp pain.

I did a slightly slower pace, but still strenuous for me, on a longer run, and same thing.

I have noticed when doing crunches that I have pain in the same area, but I manage to finish anyway.

I think i partially tore or maybe strained something. I suppose I know what the right thing to do is in the long term, but I really can't fathom sitting on my arse for a month.

Anyone successfully beat this?