Having many pregnancy symptoms, period has come on earlier and earlier lighter and shorter for four months and I'm beginning to look pregnant more as the day go on. Am I pregnant?

Shorter, and earlier periods is not a sign, no period is a sign.

Also, what did the pregnancy test show, after you miss a period, "or had a very light one" you test two week later.

Missed period and positive pregnancy test are the only real signs.

I don't mean to sound mean but chances are you are just gaining weight. The only sign that can be solidly attributed to pregnancy is a missed period, of which you're not having. You could be going through some hormone cycling or have another disorder that is starting to kick in. I would go to your doctor and get a complete physical as well as a complete hormone work up. Figure out what is going on.