Ditto on the pregnancy test. Keep in mind that the more we think we may be pregnant, the more we "trick" ourselves into having the symptoms, including late periods.
Take a home pregnancy test, it is very likely to show positive by now if you are indeed pg. They are extremely accurate and reliable. Use first morning urine to get the best possible accuracy - (this concentrates the hormone in your urine)
A lot of your symptoms, as you pointed out, are very indicative of your period coming. And it's still VERY early if you are pg so it's doubtful they are pg symptoms. That's just my opinion.