My theme is messing up and keep changing my homepage and removing my content ***********HELP!!!!!!!!!!***************

I am beyond upset. What is wrong with this theme. My website keeps going to some HELLO WORLD post after I've spent countless hours into this website. I am so unbelievable upset. Do you know how frustrating it is to put so much energy, time and money into something and it's not doing the job it's supposed to do. My website is here: and every now and then on a new refresh it shows crap instead of my correct content. What is going on? Do I need to buy a new theme? I hope not because I'm so sick of doing that. www.pureonebeauty.com I have an active advertising campaign and I'm beyond devastated at this.