On Friday i had dives down to 23 meters knowing that my previous dives were maximum on 15 meters. When i used to dive to 15 meters i was feeling afraid when i reach the bottom, also when i dived to 23 the mask was pushing hard to my face and i was pushing the mask with air from my nose and also i was feeling afraid when reaching the bottom and staying for 2-5 second then going up again. My question how can i know how much deep i can dive and which depth is considered as risky?