(Sorry for any grammar mistakes.)

I've been diagnosed with both anxiety and depression for a while now. I've been prescribed a medication which is working well for me so far, but I still have lingering issues (obviously, since drugs don't just make problems disappear.) One of them is when ever someone says something negative my suicidal thoughts increase. Like, I want to kill myself right there and then. 

When someone, for example, argues with me, or even just bickering, about the smallest things, my suicidal thoughts increase, and really consider killing myself. I even search up what the fatal dosage of many medications. 

Now, I am very oversensitive, and I accept that. I'm just so damn close to taking more medication than I should to end my life. I'm just at a loss of what to do. Am I being oversenstive and dramatic? Or should I tell someone. I have the bottle near me right now. I'm only 13, and this is my last resort. I didn't plan on posting anything, but I feel like I have no choice now. I feel so, so alone. Can someone please help me?