Hi! How old are you? How R your period behaving? R U able to list the symptoms? Take a list with you to discuss with your GP, don't be fobbed off. If offered a prescription don't feel it necessary to change it up immediately, you can ask here what has been suggested. Then U can decide without spending money. ;-)
Browse round. Make notes. Some find that keeping a mood/food/syptom diary of use.
Let us know how you get on.