Looks like 3 weeks...
Here's the full write up (this is from a trusted source, not just some crackerjack stuff from a magazine, just FYI)
And having just read the full thing - I am going to emphasize (for myself, and encourage others) that knowing is half the battle. In fact, so does the author. There are two statements in here that i am saying "Cancle cancle cancle!!!" to. I still have a final to submit and places to be - so I accept ONLY that I will accomplish what I need to when I need to. Just because it is written, doesn't mean i have to accept it It just amazes me how many people are in a bad place right now (bad moods... etc). Then i remembered the article:

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On Saturday, Mercury became retrograde in the sign of Taurus and will stay there through May 11.

During Mercury Retrograde periods, we have problems with communication, computers, electronics and travel. Computers break down, people have miscommunications and arguments, relationships end and cars break down.

Taurus represents issues with hoarseness, bronchitis, foot pain, muscle aches and tics. It also represents stubbornness, so be aware of any stubbornness in yourself and be understanding when you witness it in others during this period.

Mercury is a quick moving planet and is only retrograde for about 3 weeks. During this period, unresolved issues from the past will rear their heads to be dealt with.

It rules our thinking and perception, processing and disseminating information and all means of communication, commerce, education and transportation. It also rules people who work in these areas, especially those who work with their minds or their wits: writers and orators, commentators and critics, gossips and spin doctors, teachers, travelers, tricksters and thieves.

During this period, you may see more personal misunderstandings; flawed, disrupted, or delayed communications, negotiations and trade; glitches and breakdowns with phones, computers, cars, buses, and trains.
Do not make important decisions while Mercury is retrograde, since it is likely that such decisions will be clouded by misinformation, poor communication and careless thinking. Mercury is all about mental clarity and the power of the mind, so when it is retrograde these intellectual characteristics tend to be less sharp than usual, as the critical faculties are dimmed. Make sure you pay attention to the small print on any contracts.

Mercury is the trickster and can make us feel foolish and inadequate if we aren’t able to flow with the energies.

Being aware of this over the next few weeks can prevent some of the problems.

http://www.askclaudia.com/blog/?p=96