No, I would not think that is bi-polar, at least if that is the only type of behavior you exhibit, ie. anger (albeit excessive) about what seems like an unreasonable request.

Bi-polar would normally include irratic behaviour, like gambling your rent money away; sleeping with 10 men in a weekend; or other extremely destructive & compulsive behavior. It's like a roller coaster of emotions, but also includes extreme "high's" and "low's" in behavior too.

Bipolar (manic depression) causes "moods", which effect changes in energy and behavior. The periods of ups and downs are called episodes of “mania” and depression.

A manic attack is diagnosed if “elevated mood occurs with three or more of the other symptoms, nearly every day, for one week or longer”.

If the “mood is irritable, four additional symptoms must be present”.

According to the following site, the signs and symptoms of mania include:

• Increased energy, activity, and restlessness
• Excessively “high,” overly good, euphoric mood
• Extreme irritability
• Racing thoughts and talking very fast, jumping from one idea to another
• Distractibility, can’t concentrate well
• Little sleep needed
• Unrealistic beliefs in one’s abilities and powers
• Poor judgment
• Spending sprees
• A lasting period of behavior that is different from usual
• Increased sexual drive
• Abuse of drugs, particularly cocaine, alcohol, and sleeping medications
• Provocative, intrusive, or aggressive behavior
• Denial that anything is wrong

http://www.nimh.nih.gov/health/publi...lication.shtml

I would suggest that what you are experiencing is "emotional lability", which is quite common with MS. It can be exacerbated by fatigue, especially.

Cherie