A while ago I dropped my iphone in a pool it was in there for about 3-4 seconds, when I got it out if had black and white lines on it. It then got really hot. When I got home it placed it in rice and let it sit for about 3 days. After I charged it and I found out that the sound works and Siri works, I could also call people with Siri and I could pick up calls with sliding my finger where "answer call" is. The only problem is at the screen is totally black. Help please