I dropped my iphone 5s in the pool for 2 seconds at the most?

I tripped outside and my phone hit the concrete then bounced in the pool.it was still floating when I grabbed it out so it was barely in there. I looked at the screen and it was pink-ish (because I was listening to a song and the album cover is hot pink) and there were horizontal lines. I instantly panicked and ran inside and put it in the rice. About two minutes later I realized I had forgotten to take the case off and I took the case off, sucked water out of the holes, wiped the excess water, and put it back in the rice. I tapped the home button and so no activity so I stopped and put it back in the rice. I know I shouldn't have hit the home button but I couldn't stop myself-- I instantly regretted it. But I searched google and saw that that doesn't always fry the phone so I'm trying to stay positive. I plan on keeping the phone in the rice for 48hrs. What concerns me is that from what I searched on google, people were able to power the phone down and slide the red "power off" button to turn off the device. I wasn't able to do that due to the horizontal lines and colors… Is that bad? I very upset by this.

Hold the power button down for like a minute it will turn it off anyway.

Put the phone in rice then try it. Leave it in the rice for 10-15 min. Then try it. If it doesn't work then call apple tech support and they can help you