Cannabis consumption before long-term rehab?

Hello

I have a question and hope someone can help me.

I had a problem with cocaine & cannabis and therefore went into withdrawal

(Actually, the problem was cocaine, but I specified THC because they only admitted THC and alcohol patients)

So, I stayed there for two weeks and was then finally released. However, I was supposed to do long-term therapy, i.e. rehab, because I also have a bit of a mental health issue.

I have an appointment next week for information and help filling out the forms.

So overall you can expect it to take 6-8 weeks. I would say that I need at least 6 weeks for the recording because I still have to sort out a few private things.

my question now:

I know they do drug tests. But what happens if some THC is still present? Will I be denied admission? I'd like to smoke, not every day, but sometimes when the weather's nice, by the lake, for example.

Does anyone have experience with this?
I'm a little scared at the moment, but I'd like to smoke one.