I’m scared and depressed..

I don’t know what to do anymore, I feel like a failure and a quitter .. I’m dealing with mental health issues and it’s becoming too much .. I’m scared been thinking of ending it by overdose and im on my period having bad cramps so I’ve already taken the max amount of Tylenol 4 pills in a 24hrs.. I’m tempted to take more or even the whole bottle ... I’m lost and scared and I just want to give up on everything I’ve been doing research and you can overdose on Tylenol and I’m tempted I don’t want to suffer and I just want to go to sleep and not wake up anymore