I would like some advice, I recently noticed a pattern where I took a Friday off and got moved to the next shift, I used to work from 2-10:30pm and now I work from 10-6:30am, my job has done this to me three times now, the first time I had an injury and could not work for a whole week, the 2nd and 3rd time I had to call out of work for personal reasons, I asked my uncle who got me the job and he has told me that if people take a Monday or Friday off they get sent to the next shift to inconvenience the person for the foreseeable future all because you inconvenienced them for one day, I do not want to quit and I just want to be able to take a Friday off without fearing loosing my hours, what can I do to solve this issue and should I get OSHA involved if needed?