Experiencing Rib Pain, Chest Tightness, and Shortness of Breath

I have been experiencing rib pain, chest tightness, and shortness of breath, especially at night with the shortness of breath. I also get PVCs and/or chest muscle spasms. I do have anxiety and get panic attacks but it seems as though the chest spasms, rib pain, and sometimes shortness of breath are not anxiety related as these symptoms still occurred when I was on an SSRI for 6 months. Sometimes I also have a fast heart beat, over 100 for an hour or more even when I fell calm. I have had my heart checked out and it is structurally normal. They have only detected a few PVCs in the past. My lungs look okay from an x-ray and PFT. I have only been diagnosed with costochondritis and possibly asthma. But the rib pain, shortness of breath, and palpitations and/or spasms are debilitating for me and have been bothering me for years but are especially bad now. Does anyone have similar symptoms and what was your diagnosis and treatment?