Trouble with transfering music?

I have a iphone 4 and i just got done rebooting my computer.well it seems like i can't seem to transfer new music from my computer to my iphone. I tried "Sync with this iphone over Wi-Fi" but its not syncing my phone. The option isn't there for me to click on my phone either. So i was thinking if i could transfer my music from my iphone to the computer… Unfortunately i can't seem to find the solution to that as well… So what can i do? I have over 700 songs and i don't wanna go and 'sync music' cuz it will reset all my music. Is there another way i can do it? Am i doing it wrong?

Added (1). I tried 'manually manage music and videos' but it shows up saying that, 'An iphone can be synced with only one itunes library at a time. Erasing and syncing replaces the contents of this iphone with the contents of this iphone with the contents of this itunes library.'

Added (2). I tried 'manually manage music and videos' but it shows up saying that, 'An iphone can be synced with only one itunes library at a time. Erasing and syncing replaces the contents of this iphone with the contents of this iphone with the contents of this itunes library.'

Cracked iPhone 4S Screen Sprint?

So I recently cracked my screen, but I've only had it for 7 days. Apple has a 1 year warranty for all apple products. Can they help me? It's just the screen not the back.

Why is my package taking so long?

I bought a iPhone case like 2 ekes ago and the shipping was 2-3 days and they still haven't gotten here. Plus I'm in Houston and they went to Houston then got shipped to Dallas?

NEW iphone 5 says no service?

My new iphone 5 says no service. I just got it yeasterday. The person who was at the counter said that i had to turn it off and on every 30 min till it says Rogers (the company i got the phone at) but it doesn't say it. It still says no service. My sister got it at the same time, hers say rogers…
what is happening?

Why do people think they can talk to me any kind of way?

I'm the youngest in my family (15) and I'm staying at my adult sisters house for the weekend. This morning she cursed me out b/c I didn't pick up her crying baby. ( I honestly thought she wasn't letting the baby cry on purpose, but I didn't know she was busy cleaning the house) I was laying in my bed on my iPhone. I started to cry and get really angry b/c I have no clue why I just don't defend myself. In the past she has send very mean things to me (dumbass) what should I do?