Anxiety disorder symptoms, anxiety test,

I’m a student. I would like to ask doctor’s opinion on what I’m feeling, whether I have anxiety or only stress-related work(assignments). My problems are, I often feel anxious, worry, overthinking, stomach discomfort, heartbeat faster than usual when I’m facing something that I’m afraid and worry. For example, there is deadlines for upcoming assignment, just by thinking about how I have to finish it make me feel just like those I described above. When someone said something to me, I always overthinking and develop these above feelings, like I’m when I’m being scold or getting reminder over something about my mistakes. I tend to remember this event even though its over, and have been past few days later. Every time I remember this, or worry over something then I feel anxious, worry, overthinking, stomach discomfort, heartbeat faster than usual. But these feelings disappear when I forgot about it and reappear when I remember or having this thought. I also often feel worry about what is gonna happen to me, like when the next thing is I have to do something that way far from overdue. I also often feel like being judged. My biggest problem is I confuse am I having anxiety or it just because of my personality, which is anxious social introvert. I always thought that, oh here again i feel anxious, fasting heartbeat, stomach discomfort because I’m introvert. I really dont know. Its confusing. because especially when I have to present in the class, I’m going to develop all these feelings plus shaking hand. So, I would like to ask Dr, either this is because of my personality or I’m really having anxiety. One more thing, I only phase this each semester, when I have to face assignments, people but not at home. so i wonder do I really have anxiety? or just litle worrying that is normal for student. or i also wonder if i really have anxiety, and entering semester just trigger it. I’m sorry for providing this long. Thank you in advance. I hope i will get response from Dr.