Hey - ive had a stomach ache since around 11dpo, and it hasnt gone away! Im seeing it as a good sign, that there is a lot going on, and aches and pains will happen - think I will worry more when it goes away,lol!
Im sure its perfectly normal, but im also sure that someone on here will probably be able to reassure you a lot more than I can - hey, what do I know,lol!
xx