I'm feeling worried because on friday evening I suddenly felt bloated and had to undo my trousers due to my waist expanding and then had bad tummy pains which were worse lying down. It is the type of pain you might feel with a tummy upset but I've had no d or v with it. I am mid cycle and not pregnant. The whole time I feel as though I need to burp and it gets worse in the evening. Does anyone know what it could be? I hesitate to go to the docs in case it is just trapped wind or something minor but how do I know if it is a minor prob or something more that is wrong?