I suffer shortness of breath with dizziness, lightheadedness, and left arm pain. Kindly help.

Hello doctor,

I am a 31-year-old female. I weigh about 264 lbs, and my height is 5'3. Last week evening, I felt like my heart stopped, and I had to force air into my lungs and had shortness of breath, dizziness, light-headedness, and pain in the lower left arm. I do not have chest pain. The next day morning, I went to the ER. Blood work, chest x-ray, and EKG came back fine. CAT scan was not performed. I saw my family doctor. He did blood work for my thyroid, and those scans were fine. Results were said to be anxiety. I was put on SSRIs and given anti-anxiety medication, but still labored breathing on and off. During the night, I woke up because I could not breathe and was dizzy. I get winded and tired even more. Doctor reinforced the anxiety diagnosis and Psychologist referral given. I will randomly get dizzy and light-headed now with breathlessness. Is this something I should get a second opinion about? Medications: Lisinopril 20 mg daily, Hydrochlorothiazide 25 daily, Sertraline 50 mg daily, Hydroxyzine HCL 25 mg as needed. Daily women's vitamin, iron. Previous surgeries: Tonsillectomy, gall bladder removal, corneal transplant. Conditions: hypertension, anemia, morbid obesity, keratoconus, GERD, anxiety, depression. Lifestyle changes: stopped smoking, started small weight training and movement exercises, yoga and deep breathing. Dietary changes as well to lose weight. Two years ago I was 400 lbs. I have slowly been trying to lose weight.

Thank you doctor,

My issue is that I am light-headed and out of breath when I get up. Lightheadedness and out of breath happens throughout the day, and this started two days. I do not have any hormone testing done, but my cycle is regular, and I keep track of that on an app. I had sleep apnea before tonsillectomy. It is not an issue now.