I need help

It's totally normal and not a relapse. Just practice pushing those thoughts away. Good luck!

 

No, that's not a relapse. You can't blame yourself from having sexual thoughts. That being said, sexual thought in early stages often lead to porn. What will help you to stop fantasizing is to do something that needs concentration. Go read a book, repair something, have a conversation with someone, cook… Activity should grab your focus, so your thought process gets interrupted.

 

It's completely normal having these thoughts. Your brain does a lot of things by itself you can't control. If you fight it, it will become worse. Just don't act on the thought and don't fantasize too long. It will pass and it's normal. If it becomes too hard get busy, do some push-ups or take a cold shower. Sometimes you will have random erections and/or your brain tries to convince you to fap. DON'T. It's not you who wants to fap, it's your brain which needs its dopamine fix. It wants to escape reality, face it and it will be easier. If you want to fap always remind yourself that it won't solve your problem.