I Have Been Taking Metoprolol For Two Months And After

I have been taking Metoprolol for two months and after about a week I started having shortness of breath and the desire to yawn but only able to take that deep breath occasionally so I could do so. I have discontinued the drug and been away from it for two weeks, and though the symptoms have abated somewhat they still return for periods every day. Can I still relate this symptom to the drug