Okay, tell me, am I crazy or not...

Okay, so i am in college, and my boyfriend and I always have protected sex, ie. Condoms every time no question. And he always pulls out. I am not on any form of birth control medication. The last time we had sex was over a week ago, and before that was a week long break as well. I have been super stressed out by family these past couple of weeks. And I just got back from vacation where I threw up while asleep after many margaritas and vodka cranberries. I was nauseous the day after and have felt a bit off since. My period was supposed to start two days ago, and I have been panicking a little bit, which does not help the already existing anxiety. I will not have health insurance until tomorrow due to being a military brat.

I have been a bit crampy, constipated, headache, slight soreness of nipples, and just crummy feelings in general.

What should I do? Take a test or am I just crazy?