Weird Gas? Spotting.

For the past 5-6 months my period has been completely out of whack. Spotty and irregular. I've also put on about 10 lbs, a decent amount on my middle.

I've taken a pregnancy test every month because I've been late so much. All negative then I'll spot some.

Then I've been having weird gas? that feels like movement. I don't know what the deal is. I'm freaking out a little. I think I've watched too much 'I didn't know I was pregnant'.