i've been having a lot more anxiety and panic attacks in class recently, but for some reason, i feel like i can control it. there haven't been many triggers, just an overwhelming feeling of nervousness all of the time. i start shaking really hard and breathing hard and my heart rate goes up, but i feel like i can tell myself not to, and i always feel like "you know nothing will happen, so why are you like this?" and my the rational part of my head is usually clear during the attack but my body can't control it, then it leads to a bad feeling of guilt because my teacher and classmates are concerned, and i almost feel like i'm doing it for attention, even though i try my best not to draw attention to myself while it's happening. is this normal?