Why does my iPhone 5s keep adding unwanted words while texting?

I have had my iPhone 5s since January of this year. A month or so ago, it started like predicting what I'm going to say so it adds words even if I don't want them. It like remembers words I often use together in a sentence so it thinks I'm going say one thing when I actually want to say something else. I'm constantly having to go back and delete unwanted words or completely redo sentences because my phone adds word I don't want. I've turned predictive off in the setting but that did nothing.
That's probably not the best explanation but that's the best I can do. Hopefully someone understands what I'm trying to say and knows how to fix it.

Am I supposed to be thankful that I have a job?

My next door neighbors have no job and everyday is the weekend for them, the gov pays their bills. They also have nicer cars than me, expensive clothes latestest Iphone etc… Why do I work? There's no honor in it for me, I had thought you had to work to get things in life but that is wrong.

IIm not getting notifications on Instagram?

I recently logged into my Instagram on my new iPhone 6s Plus. When I logged in I realised that I wasn't getting notifications for anything, so I made sure everything was switched on (they all was) . After that I logged into another one of my accounts and i got notifications for that one? Does anyone know how to fix this?

I dropped my iPhone 5C and I'm unsure what to do, it still works, just not the picture screen?

I dropped it earlier and as soon as I did, my screen would not work anymore. Whenever I turn on my iPhone, it shows a bunch of random colors and not what appears on the screen. It's a bit aggravating to me because I have important information on my phone and I can't afford a new phone I believe. The whole upper left half of the screen is cracked and it shows a bit of the inside of the phone. Would it be best if I take it to get a screen repair? Need an answer As soon as possible!

Added (1). I dropped my iPhone 5C and I'm unsure what to do, it still works, just not the picture screen?

If time travel will be possible, will this be a good idea?

My History teacher told me they built another World Trade Center since we're learning about New York in World History. What I was thinking, take some pictures of the buildings on fire and go back in time to tell them that this is what will happen, then show the video on my iPhone. Will it be a good idea?