I felt exactly the same way at the same point. My study plan called for something like 8 days on Linear AC circuits and I ended up wasting three weeks on it, screwing up the whole schedule, so I can definitely identify. Don't panic! Keep it going. Remember to soar with your strengths and keep building up on the weaknesses. Part of my strategy was to be very good at some things and do the best I could on the rest since there is too much information to be good at all of it.
A buddy once told me that he sat next to an elderly, brilliant, accomplished engineer on a plane one time and they began discussing EE. The guy says "There are maybe 5 people in the world that truly understand electromagnetics. You and I are not one of them."
In addition to working some problems at this point, maybe try studying some different sources or doubling the effort for a week just to break up the log jam you're feeling. You WILL win! bump