Heartburn and Rage

So I'm 21weeks and 5days, if the heartburn doesn't kill me I'm going to kill everyone else. I have this near uncontrolable rage that comes out of nowhere and I just snap at whatever/whoever is around. Last night my hubby was cuddling me and I told him that if he didn't get his arm off me I was gonna cut the damn thing off. I don't want to get angry, and it's all over stupid little things, but I can't help it!! I'm keeping some peppermint tea close at hand and I sprayed lavender oil on my pillow to keep me calm, but what can I do about the heartburn?? Tums only last about 10min...