What Causes Sudden Breathlessness And Numbness In Head?

hello, I am having sudden shortness of breath, started few hours ago while eating dinner, all of sudden it was like I couldn t finish the the whole breath took several minutes to get back to normal and at same time it feels like I cannot get oxygen to my brain, my head goes numb like and tingling, almost like I have laughing gas in me or something, keeps coming and going. not sure what to do. I am 42 and had a sonograhm done on my heart and a stress test last month. stress test was good but there was something on my ultra sound. the nurse said nothing real serious but to make an appointment to go over it and I never did. I was having some shortness of breath last month and that s why they did these test