Actually I am in uni rn but I graduated with IB diploma:) I totally understand how you are feeling right now, especially with IA deadlines and IB exams coming around >o< I think it's important that you picture yourself after graduation. It can either be your dream uni or just enjoying your life without worrying about that IB! (for me it was both) It was also very hard for me at that time and seemed like it's not gonna end, but voila! Here I am in my dream uni with so much different and better life ^u^ Just try your bestest and you will go through it. Trust me after you go through it, you will be so proud of yourself :D
Wish you the best luck with IB ^o^