I began having repetitive thoughts and thinking about doing some really odd behavior, is this normal after doing meth?

Stop doing meth: There is no such thing as "normal" after doing meth, any more than it is "normal" to do anything else that almost guarantees it will take your life on a turn for the worse. Meth is causing you to become mentally ill. Keep doing it, and you'll be confined to an institution or homeless; you'll lose your job, your friends, probably your bowel and bladder control, and ultimately your mind.