Hi my husband has lately started feeling pressure in his chest, specially when in car, he thinks he has difficult breathing... he is 32 years old?

Anxiety attack or. panic attack type thing. Having said that still may need an ekg, stress test , chest x-ray , d-dimer test etc. to rule out important heart and lung problems. Take him to an urgent care or ER if you can not get a hold of his doctor by phone.