I also have had costo and the first time i had it, it took near enough 6 months to clear up.
I sympathise with you, its so painful i get pain in my arm chest and face with it also
Hope you feel better soon!
I've have costochondritis also. Sometimes it takes several weeks or longer for a flareup to settle down. I'm not sure what brings on a flareup, but it hurts! My doctor suggested Ibuprofen and it really helps me.
Welcome to the community! We're glad you found us and hope you find the site helpful and supportive.
connie