well since its not regular and that both of the test were negative i would say its a pretty safe bet that your not, I hoped this helped with your nerves
If the pregnancy tests were taken correctly, then I doubt you are pregnant and would say that stress is causing your period to be late. A test would show up positive by now, so you are in the clear. Try to relax and just wait for your period to come. Though do use this as a learning lesson and next time don't have unprotected sex. It's really not worth the stress and worry. Have him use a condom and I also recommend that you get on some form of birth control as well. There are many different options for you to use, so make a doctor's appointment and talk to your doctor about what will work best for you. The pill can be annoying to take everyday and it can be hard to remember, so doing something else like the implant, patch, etc can be a lot easier to deal with. Hope it goes well and have a good time in college.