HI! I am sorry you and your son are going through this. Has to be very disconcerting. I am glad you feel you can reach out to share.

Do you feel your son needs immediate help, as in right now/tonight? If so, go to an ER and tell them the story.
Do YOU need immediate help or are you doing okay enough to be there for him through the night?

If you feel your son and your family will be safe through the night, and you can/will take measures to see him through, as in keeping watch of him , etc., you all might be okay to seek help from the doctors you and your son know and with those who also might know him...and you (esp as a mom).

We can troubleshoot ideas if this helps. You and your H and your mom should be able to keep him safe?

If I was sure he is okay through the night, and the adults will see to this, for sure, I. personally, would likely trust the input of doctors I know. If you think (reasonably) that you can get him better help tomorrow and can truly safely see him through, then this might be a viable option?

I agree with BethRags, in that hiding this, or any part of this, might only get you into trouble.

How are you doing?
What are you thinking?
Are you feeling stable enough to handle this well?