1. Yes, the High Court may cancel your bail for neglecting in complying with the terms against which you have been set free on bail,
2. Your advocate should have filed an application submitting medical certificate of your illness on the days when you could not attend the court,
3. However, collet the said medical certificate and produce before the High Court as an evidence of the reason of your absence and duly showing the reason why your advocate did not file a petition before the trial court praying for leave of your absence on medical ground,
4. Since you had not engaged any advocate at the lower court, this could be valid and acceptable reason for your not filing the above application before the lower court on the days of your absence,
5. Engage a lawyer at High Court.