While Trying To Sleep Last Night, I Experienced Throbbing Headache

While trying to sleep last night, I experienced throbbing headache (I rarely get headaches), flashing lights behind my eyelids, loud ringing in my ears (normal for me), and minor pain in my stomach. I am 72 years old and had a stent put in my heart last June (LBBB); I also have psoriatic arthritis.