Talk to Cardiologist on Heart And Stress

Iam a anxiety patient and had panic attacks in past but now iam in recovery session so now my heart beat is becoming normal and breathing issues is also better now i started workout for an hour on daily basis since 2 weeks only Now iam facing when i started walk in normal speed everything gone smooth but when i increase my speed i got pain in my left arm n shoulders n neck then i slow down pain goes away then no breathing issue I repeat this pattern on and off i walked 2600 mtrs daily with 100 leg raises and 1 minute deep breath and 100 mtr running after running i become bretheless and got pain in left arm its stays just for 2 to 3 minutes then disappear n i feel now more energetic after workout but it triggers me that pain should I stop?