Nevine, welcome to the MS forum. Wow, you live in Egypt--a place that I would love to one day visit!
MS is very unpredictable, so it's hard to say how long an attack will last. First attacks will sometimes be very hard and last for several weeks or even months, but this is so variable. Also, attack times will even vary in the person themselves. My last attack only lasted a couple of days. However, I've had attacks that have lasted several months.