Pre requisites, Course Timetable

I joined Deakin for my Masters in T3 2025. I am an international student. I just completed T2 2026 and awaiting results. In my course, I have pre requisites. In T1 2026, I needed to take one pre requisite for Capstone A but I took another unit. So, now in T2 2026 I'm taking the pre requisite for my Capstone Project A. So for T1 2027, I'll have Capstone A with 3 other units. This seems that I have to do an extra trimester to complete my course and remaining capstone B as I need to complete capstone A first. Also, my visa is till August 2027 but T2 2027 goes till October. Anybody had the same concerns? Is Capstone A in T3 2026? I was hoping to take a break in T3 2026 but I'm concerned about the delayed caused.