Pregnant Or Paranoid?

I know the obvious answer to this post is ; go buy a pregnancy test, hahaha, but I want to get input before I do that, only because I think my symptoms are not so obvious . So my period comes on the first of every month like clockwork. Last month my "period" came but it literally was completely over by the 3rd and there was only slight bleeding . I didn't think anything of it because I'm the kind of person who trys not to panic . However, since then I've noticed that if I don't eat right away in the morning when I get up, I'm super nauseous. And after I eat meals throughout the day, I get really nauseous but I never throw up. My cravings for food are out of hand and all over the place and I crave things I don't even like, like milk for example . (Had a whole glass the other day, and loved it, btw ... I HATE milk) I keep getting this feeling of like .. a tightening in my lower left belly, which I've never noticed before. I just realized today is the 5th and my period isn't here . I know it's not long after its supposed to be here so yes it COULD be late, but it has been consistent for the last 5 months or so , with starting on the first and ending around the 5th. My boobs have been a little sore, but I thought it was just the whole PMS thing. My boyfriend and I had sex in April during my last period, well the last two days of it and then next day and he didn't pull out all three days because we thought the chances of getting pregnant would be less likely then (dumb ideation, I know) . So what do you guys think, pregnant or paranoid? PS, thanks for reading all of this. =]