So, I did it again. ( cocaine ) How do I deal with this setback now?

I was on vacation with friends, we drank a lot, and then we decided to do cocaine.

The whole night was fun. I felt a little dissociated, after it but I wasn’t panicking or anything.

The next day I felt terrible hungover and dissociated but I was sure it would fade away. Now it’s been 4 days, and my anxiety is getting worse. I’m starting to get scared that I’ll stay dissociated for months again.
I’m regretting those decisions a lot. The weird thing is that I didn’t even have a “bad trip” or anything. I was just high, and then the hangover never really seemed to go away. I still feel dissociated and anxious.