I actually had it jacked back up and my dad noticed the inside joint on the passenger side halfshaft has a decent amount of play in it. I'll replace it now and see if it helps.
And to answer your question, it actually did it all the time. Even accelerating like a grandma had vibration...the harder I got on it, the worse it was.
Hopefully this halfshaft will make driving it bearable before I go back to school.
Going down the road at speed didn't show any problems really. The car rides and handles great...just this vibration issue that's bothering me.