I had problems getting my proctored exams too. Sometimes if you have transfer credits, the program for some reason doesn't recognize this. What helped me was calling 1-888-427-1000 and picking the option for your career program. It got me to someone who could look and make sure that there was no problems with sending proctored exams or they could tell me when they were sent.
You do need to have them finished before you can continue with semester 2.
Hope this helps.