No late periods 5 neg hpt could I be 5 mos preg?

Generally, no, there is not a chance of being pregnant after 5 months, regular periods, and negative tests. Not sure what has you freaking out, but if you have lingering doubts, make an appointment with a doctor or Planned Parenthood and get a blood test or ultrasound done... That would put your mind at ease.

I would say that after five months you are definitely in the clear and you should be fine. What leads you to believe that you're pregnant still? Have you had any symptoms of pregnancy at all?