Trouble concentrating

suzstar

I've been noticing the last week plus I've had a great deal of trouble concentrating on things for more than about 20 or 30 minutes. Has anyone else had this problem? I'm 13 weeks along and it started just about the time I hit 12 weeks. Before this I didn't really have a problem. It doesn't seem to matter what it is, save for reading a book for pleasure, anything else just gets me irritated and somewhat miserable if I try to do it more than 30 minutes. That even includes doing my studying and it is driving me crazy! I have my last final on Friday and I can't concentrate to study! *sigh* Any ideas or suggestions to get my brain functioning?