Work Crawling Out of the Fence...again!

So these last few weeks have been weeks of seeing my flesh play out horribly in the classroom. I have screamed and lost my cool more times than I care to admit. It seems nothing I try gets results with these kids. I feel like a miserable teacher and to top it all off a parent  came to my assistant principal yesterday with concerns about her child not wanting to come to school. She thankfully referred her back to me, which I appreciate, but the parent has yet to contact me and I only know that about the concerns cause the AP gave me the heads-up. Well, I've tried to contact the mother and her cell apparently, according to her request is not taking INCOMING CALLS! I feel horrible that I can't even do anything to contact the parent and attempt to get this all straightened out. I hate having some conflict that I have the possibility of fixing, and not having the ability to attempt to resolve it. It's nights like these that make it so tremendously difficult to leave work at work. Work is crawling out of it's fence and I feel useless to get it back where it belongs.  Jesus, I need your help cause I'm probably trying too hard to fix this all by myself.