Do continue working through treatment and take up that inpatient option if things become too hard. Taking an OD is never advisable - apart from my wanting you to stick around - a failed attempt could leave you with physical damage to the brain or organs, which will make life infinitely more difficult. Brain damage could leave you unable to function or reason at all. I know it is difficult, but do weigh up every scenario and consequence of a suicide attempt.

Hopefully, your treatment will go well and my Post will be unneeded.

Dave.