Strange indigestion and stomach pain

Anna • Had our first baby in July 2016, now we are due with baby #2 due January 2018. Over the moon with love and joy for These two little miracles 💕
Last night my DH and I were driving and I got heart burn and stomach cramping like no other! It just hit me and lasted all night until I went to bed!! I get indigestion sometimes but not like that. It was unbearable! 
Anyone else ever have this happen?
I am also in mr fertile week according to glow I don't know if that has something to do with it either.