The feeling that you have “little control over your thoughts” is clinically, in the realm of anxiety disorders, referred to as intrusive thoughts. Intrusive thinking is associated with a specific type of anxiety disorder called obsessive-compulsive disorder (OCD). Generally speaking, intrusive thoughts are unwanted, unpleasant and seemingly uncontrollable thoughts of a disturbing nature. Some common themes include: having mental images of killing a family member, friend or spouse; excessive fears of accidentally harming another person; accidentally hitting a pedestrian with a moving vehicle; or the fear of harming or molesting a child.
You also mentioned that you have tics and that lately they have been getting worse. One plausible theory is that your anxiety is making the tics worse. If I were interviewing you in person, I would inquire about whether or not you have been experiencing an increase in stress and anxiety. It is possible that a stressful event or an overall increase in anxiety, is directly affecting your tics.
It is difficult to know with certainty what may be wrong. With such limited information I can only provide a speculative answer. It would be best to have both a psychiatric and a medical evaluation. A medication evaluation is especially important to rule out a physical cause. A psychotherapist can assist you in reducing your anxiety, if that is a part of your problem. Please take care.