I suffered from severe panic disorder and after taking b vitamin supp i don't have them nearly as often or bad, does it make sense?

Possibly so: I'm not sure what specific supplements you've been using? One small study (n=21) found that people with panic and hyperventilation attacks were more likely than others to be deficient in vitamin b6 and iron. http://www.ncbi.nlm.nih.gov/pubmed/23603926 it remains to be seen whether replenishing such nutrients will consistently reduce number and intensity of attacks. I'm glad it helps you, though!