It can take several days, if not weeks, to recover from a spell of sleeplessness. Keep in mind that habitual good sleeping is the best way to recover sleep and start feeling balanced again. Relax and give yourself time to recoup your "sleep debt," which are the hours of sleep lost that must be repaid.
If anxiety - from work stress, home life, or sources unknown - is preventing sleep, then reducing sleep debt is only part of the solution. Although we can't ask the world to stop being hectic, we can add stress-reduction techniques into the daily regime so we can manage the stress better.
Bottom line: Create a peaceful space to begin winding down an hour before you plan to sleep, and engage only in relaxing endeavors until you hop into bed.