I too have GAD
I Have the same problem with every cycle
some substances make it worse others are not so bad
Don't forget anabolics are stimulants too dude!an can over exite the body
The way i see it is i have always had the condition ie anxiety,pac/pvcs,racing heart ect but the Anabolic Androgenic Steroids (AAS) brought me closer to the anxiety/panic threshold.
they don't appear to be dangerous but can be quite scary
Can be controlled to some extent with meds tho
I have found my remedy,you got to find yours as everyone is different
I have always used on a cycle and found them to be very effective in keeping threse palpitations under control
Stricly NO CAFFEINE
Low glycemic carbs(ie brown rice,oats ect)
Fish oils containing high epa and dha(recomended amount on bottle)
L-carnatine (recomended amount)
4 litres of water
and some prescription anti anxiety med from the doc(or can try herbal alternatives ie scullcap,valerian,hawthorn berry,ginseng,kava,)these have a calming effect on the body(personally didn't help me much but you may find they help!)
Do not cycle without having this checked first as your health and well being is your utmost priority mate.
Hope that helped !