Songs delete off iphone after syncing?

After i synced my iphone on the computer that i always sync my phone on, almost all of my songs are deleted. They still show up on my phone but when i try playing them the phone will skip over them and go to the next song. I have over 10,000 songs and do not want to have to wait for a majority of them to sync onto my phone again

This type of thing happened to me once with my ipod… What probably happened is you may have restarted it or reseted it… Which is what my mistake was but if this not yurs than u more than likely have to just resync it again.