I'm in the same position, I have english language, 2 history, 2 biology, 2 physics, 2 chemistry, maths and a computing exam left. Don't hit yourself for feeling unmotivated, there are so many people in your position, me included. I find that last minute cramming works a treat and so I'm using the half-term to relax and reenergise so that when it comes to the night before my exams, I won't already be tired, bored and exhausted by working my bum off in the holidays. Choose a few facts to learn each day and just test yourself on the randomly during the day, but don't beat yourself up about feeling unmotivated. Hope this helps.