Mysti I too have had it from 7-8 weeks. My sister put me onto Natural Calcium powder which has the additional benefit of ensuring you are getting enough calcium for growing bubs and mum!

I just mix a tsp in water or juice and it calms it right down.
You can buy it from good health food shops and is suitable for vegetarians and vegans as it is plant sourced.

I have heard that heartburn in pg is caused by your higher progesterone levels which loosens the valve to your stomach.

Also smaller more regular meals (I am trying about 5-6 smaller meals a day) and don't lie down for 1-2 hours after eating can also help. Also propping yourself up on pillows at night if it is really bad.

Good luck!