Problem with fantasizing

Hello.
Yesterday night I nearly relapsed from my 7 days streak because of online chat with girl. I actually started to visualize some stuff and temptation starts to be higher, I get erection but I didnt touch my penis, and any precum dont get away from my dick during this. I knew this was bad, but we exchange some inappropriate messages with each other. I have a strong urge in my head to maybe grab a dick in my hand, open some porn site and have a good time because why not. Then I realised what Im doing, I put down phone and went to sleep. I feel really bad about this today. Is it a relapse? I wanted my streak to be as clean as its possible, but after this I feel terrible :/