Started talking to guy and now he's not responding?

I recently started talking to a guy that I met on eharmony. He was the one who was interested me. We did the guided communication path on the website and he asked if I wanted to text instead. I gave him my number. For past few weeks, we have texted each other almost every single day. I thought we got along great because he is sexual as I am. On Thursday, we facetime for a bit and I told him, I will send him pictures of me later. We exchanged sexual pictures in the past. I texted him Thursday night with a few pictures and didn't get any response. So I figured maybe he's in school or busy. So Friday happened and I haven't heard from him and thought should I text him. I texted him at 6:12pm Friday and haven't heard anything. I know it's bad to stalk people but I am a computer person. I found all his social networks and online dating profiles because he uses a common username. I see that he logs on okcupid at certain times. (don't worry I'm not logged into anything, so he doesn't know I'm stalking.) So I'm here like wtf... no response.. and I'm sure he's using his phone to check those online dating sites. I'm not talking to other guys because I stick with one guy until I like him or not. Today is no Saturday and I didn't get any type of response from him. What should I do..? I want to text him again but I don't want to over due it. I'm thinking the pictures scared him off, but he knew I was going to send them... What should I do?