warfarin & health issues!

im not going to go into great lengths here and bore u all but im 28 and on warfarin for irregular heart beat and also have graves disease (thyroid disease) anybody know the effects of warfarin and also graves disease in pregnancy? im currently in TWW and have seen gp who was referring for pre conception councilling months ago that never happened! 
​have been told if i was pregnant it would be very high risk and complicated but that doesnt mean i shouldnt try..right?