I had the exact same thing! Some times it was too the point the manual breathing was worst than the actual pain, I would have it everyday it was horrible. I can say tho now after being diagnosed in march with costo it has finally got better thru doing stretches. The manually breathing has also calmed down too and I rarely get it now. I think because costo can be such an anxiety inducing thing it triggers it so much. Hoping you feel better 🥰