If you have any daytime symptoms of your sleep not being restorative, you may need to see a sleep doctor. (Some symptoms might be daytime sleepiness, lack of energy, mental fogginess, not feeling rested on waking.) Many people wake up a few times each night without apparent adverse affect. But you do want to be sure there is no underlying sleep disorder causing your wakeups. There are many sleep disorders, but a couple common ones are sleep apnea and limb movements. If your sleep patterns are problematic, I would want to first rule out a sleep disorder before considering medication. Just my opinion.
It almost sounds to me, if it is happenig repeatedly on a set schedule, that you may be in a dream state, one you can't remember, and it is causing you to "shoot" awake. This happen often to some people, and usually stops on it's own. I wouldn't worry about insomnia, or ask for medication yet, as you said that it has only been happening for a week or so. your body and mind will probably adjust itself, and correct the problem.