Panic attacks / anxiety ..

I've always had minor anxiety that started when I was young I mean young . I had horrible seperation anxiety as a toddler and still even have a tad bit of it now .. If I'm away from DH . Then as a child I would have panic attacks out of no where . I've done GREAT with not having one , unless something triggers my anxiety of course . But tonight out of no where I had a full blown panic attack ... ? I'm on the 2nd day of my period .. So my hormones could be the cause .. But has this happened to anyone . DH probably thought I lost my mind because one minute I was fine then the next I'm passing back and forth around the house , walking in and out of the house because I wanted fresh air I felt dizzy , and like I couldn't breathe , a slight bit naseous and my heart started racing . I thought maybe if I got in the bath tub it would subside it some so I tried to soak in the tub and then that made it worse (I was in there like 5 or less minutes) I hate feeling like that . I feel like it has something to do with my hormones regulating themselves because i haven't had a period really in 18 months . From having DS and now breast feeding ?? Anyone have any thoughts in this ???