Can having severe diarrhea make you become anemic?after having bad bout of diarrhea bloodwork came back showing that i was anemic all of a sudden.

Unlikely: Unless the diarrhea was related to some underlying systemic illness anemia would be dramatically unusual as a complication. In fact, with mild dehydration due to the stooling you might actually be more anemic than shown form the blood work done during this. If you are seeing a doctor they should be able to solve this successfully. Good luck and happy new year.