Any over-the-counter help for someone with breast pain off and on?

Yes but... First have an evaluation regarding the breast pain by a physician. This likely will include breast imaging to be done such as a mammogram and/or ultrasound. If there is no underlyling lesions of concern, there are a few things to try. This can include a well fitting/supportive bra, daily vitamin E supplementation, and evening primose oil. There is no guaranteed method.
Let explian. Breast pain could have several causes, you have to have check up and may be if it is normal they could give you Motrin for it.