Abdominal pain on side?

[Girl18]

For the past week I've had pain on the right side of my transverse abdominal. It feels very sore when I flex or cough. I can only describe it as a knot. It seems to be radiating to my lower back and bladder too. I'm terribly worried it's something serious. The past month I was planking everyday for up to 3 minutes. I started having a slight pain in my right side that felt like a cramp. I disregarded it and continued planking. My logical mind is telling me that it's muscle related since I seem to feel better when I stretch it but my not so logical mind is telling me it's some type of cancer or other disease. Has anyone experienced something similar?

[lofwyr]

You said all the answers in your own question. Planking every day. It only hurts when you cough or flex. It feels like a knot.

Literally all of those things point to simple muscle issues. Give your body a few days away from planking and working out, and you should always have rest days built in. Doing it everyday may well be the issue.