I took a pretty hot shower about two hours ago.. I know you arent supposed to sit in hot baths because it can cause your body temperature to get too high.. but since I got out of the shower, I've been really lightheaded and my heart is beating really hard.. I even laid down for about 40 minutes AFTER the shower, but nothing has stopped the lightheadedness and hard heart beat.. I'm almost 7 weeks pregnant if that matters.. I just don't know if this is normal..