It is not likely that you will get altitude sickness. It largely depends upon your fitness level, food regular exercise and your level of immunity. Besides that advance preparation for the trip and mental alertness helps a lot. With precise planning and climbing leader’s skills and experience altitude sickness can be kept at bay. Also sufficient acclimatization and duration of the trip if kept in balance will be more than enough. Also, Trekking Planner recommend you to carry Diamox  tables in the event of getting altitude sickness. if you wnat to make a climb succefully it is better to consum this tables to be on a saferside. If you feel like using it, it is better to have it 2 days prior to reaching the altitude of 3500 m.