Bounding pulse

Is there anything that helps with the bound in pulse I am experiencing? I'm about 9 weeks and I feel like my heart is going to thump out of my chest. I've tried the valsalva maneuver, drinking more water, nothing seems to help. It comes and goes and seems to get worse when I'm laying down. I know it's  not caused by anxiety; I typically experience anxiety through stomach issues. I can't sleep at night because my heart is pounding so bad! Any advice at all, I would appreciate it.