First question were you impacted in the ribs, unusual to crack them without an impact,.
Sprained , a lesser impact , some tests, get someone to hug you , breath in slowly if pain stop, if severe pain stop immediately. Broken ribs from injury can cause a pneumothorax( punctured lung!
Lying on your side hurts or lying on the front of your rib cage, can = paddle sore. .
No rash shirt can give you cripple nipple problems, some people have a wax allergy!
Often just sheer abrasion can cause it!
If you are not sure see a doctor.




Diagnosis of any physical problem from our forum crew is just scratching the surface, somebody with qualifications need to actual see you in the flesh, the problem is probably minor, but we would be guessing.