iOS 9 Bugs

Okay, so I updated my iPhone 5s to the newest iOS last night (October 5, 2015) and ever since then I've had nothing but issues.

- My apps crash (including Safari)

- My messages don't send (SMS and iMessage)

- My wifi connection's been spotty (not our router, we've reset it twice)

- My messages erase themselves

- If I erase a message thread, when I go to send a new message to the contact, the old thread appears that I just erased

I've loved my 5s since I got it but this is on my last nerve.

Could someone PLEASE help??

Thanks guys!