I don't know how to describe the first 3 papers. Different feeling with different environment and exam papers. I don't expect too much but I don't expect low. So, just wait. And some papers do have an oral exam after the written exams and that pretty much contribute some marks and affect your GPA.
So just pray. Pray and pray and pray.
Keep calm and fight for the next papers.
p/s : Good luck to you too, Mr Engineer. And Mrs Engineer (Shushy).