How can I play multiple effects on my amp?

I have an amp, a rp 350 effects pedal, and I'm going to get a SM57 microphone and a crybaby wah pedal. I use my amp's input to plug into the RP and I play guitar plugged from the RP. Problem is.. there are only two inputs on the RP. Which leaves only one input already because my amp is plugged into the RP already and my main input is plugged into my guitar from the amp. How am I going to record with my mic, use the wah pedal, and use the effects pedal at the same time? I know it sounds confusing lol. Is there an item I can buy that has multiple inputs that I can connect from the RP? And I can't take out the RP either because my amp is a clean only acoustic amp and I play from metal to classic rock. Thanks.