Summertime depression would not surprise me in a Virgo (that's you right?). If all goes as expected (which is never a guarantee :) you should be experiencing an energy (a.k.a. ego) surge at the tail end of Leo as sun begins to make its way into Virgo. I don't know your whole chart of course but my guess is you have Saturn somewhere important right now. That is to say, Saturn is REALLY close right now. Saturn is the task-master, the crystalline father figure (as opposed to the Santa Clausy Jupiter... giver of blessings and gifts) Saturn is the father figure who says, "A minus? Are you SURE you did your best? Couldn't get the A?" Saturn kicks our arses but the rewards are of course cosmic and in the micro, make us stronger.
Saturn is testing all of us right now in ways that are individual to each. That's my guess, because it sounds as though something core is being tested. Maybe you have Saturn in the 9th House... higher thinking/consciousness. :)