Sure! First of all, realize that everyone there has the same challenges. The transparency of a scrum-type organization can be a big change for a lot of people, and it can be intimidating to feel like everyone has a direct lens into what you're doing. But take heart, the reason for it is not to push blame onto people, but to give everyone on the team the opportunity to ask for help and work together to achieve the team's goals.
If you had the same update as the previous day because you were struggling with something, you should have called it out as a blocker. You can then have a discussion about whether you should get help and get unblocked, or whether in the interest of learning you should struggle through it and learn to learn. Don't fear, no one's putting the future of their company in the hands of an intern, so slipping a bit is not a problem. If you take the initiative to bring it up and offer the options, you will have more control over the situation and feel less tense - and come off better to your workgroup.
Well, social anxiety and/or being super introverted is a problem. Besides "look into self help books and a good shrink," (I might suggest How To Win Friends and Influence People as a good starter) I'd just say that a scrum meeting is the absolute lowest level of group interaction and a great place to try out your training wheels - if you want to have a long and fruitful career you'll eventually need to be able to communicate in larger and more formal settings. This is a great place to learn - just like you're learning the tech.
Yeah, that's being new - the general expectation is that Comp Sci curriculums leave people writing code no sane person would push into production. It's why internships are so valuable! As long as you continue to learn and improve, you should be fine (unless you are at one of those "we only hire the prodigies" places, but context makes me think that's not the case).
Relax and don't worry. This is the process of learning both technology and how to interact in the workplace. You're not expected to be great at either yet, you're just getting started. Look at each of these things as an engineering problem to solve (you can engineer yourself, too). All your teammates have the same thoughts and feelings you do, and worries about "people thinking my code is stupid" or whatnot. The scrum process is designed to help you all reinforce each other to remove those negative emotions and be able to move forward and improve constructively.
When I was a kid I was a super introvert, and panicked when put on stage at our school spelling bee. But that's something I identified as an impediment to my success and worked on over time, and I just got back from giving a keynote address to something on the order of 2000 people at an industry convention. So keep plugging away, and you'll get better.
