Mom took 300mg a day for 1.5 months. Wds?

Hello my mom was subscribed gabapentin after having shingles. She took 300 mg a night for 1.5 months. Do you guys think that low of a dose could cause wds? She stopped like 4 days ago now says she is feeling weak and feels like she has fever but nothing on the thermometer. Could this be wds? (Of course her doc didn't even mention that). What do you guys think? She has no history of benzo usage.