Bloodshot eyes with yellow spots. Side.

Hello. I am 19M with brugada syndrome with some symptoms. Also severe anxiety disorder. I got this sense of doom randomly a few hours ago like had a pain in stomach got alittle scared and the terror started setting in. I didn't what to do i was scared. I lied down. It went away in a few mins. I have had this a few times before. I have suspected b12 deficiency and i have ordered meds they will be here in a day or two. Few hours later after the doom feeling. I started getting really dull pain in my back after dinner. Have had this before after dinner usually. Then once i went to the mirror to wash my face. I saw my eyes. Bloodshot. With yellow spots. I have been having bloodshot eyes for a while this is not new for me. It's just that for me this one looks pretty scary its on both sides instead of just left. I have an increase in floaters recently aswell. I have darkening knuckles. Shaky hands. Hands can go cold sometimes. Bluish and white nails. Weakness. Stiff on back of neck left side.