Tests comes out normal for ultrasound leg and thyroid, why do I still feel like this?

I just had a right leg ultrasound done today so my ob doctor can rule out DVT. And it's negative. Normal. My thyroid test TSH, T3 and T4 is also all normal. I glad and thankful. It's just that with this tightness in my throat that happens off and on and just started yesterday and the cough I've had for 2-3 weeks, dry cough, what the heck is this? Anyone with same kinds of symptoms? I've had testing done 3 yrs ago because of pressure I feel in my upper chest and back. Lots of test. And it's all normal. The cardiology dr told me it might be all in my head and one dr said most likely it's panic attacks. Just tired of what I feelThanks.