Hi Ladyt043,
Welcome to Apple Support Communities.
It sounds like there may be a Wi-Fi configuration issue on your iPhone or router. Take a look at the article linked below, it provides lots of great suggestions that should be able to help you resolve the issue.
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/TS1398
Unable to locate a Wi-Fi network
- Verify that the network is available by tapping Settings > Wi-Fi and choosing from the available networks.Note: It may take a few seconds for the Wi-Fi network name to appear.
- Move closer to your wireless router (access point) and attempt to locate the Wi-Fi network.
- If you do not see the network you would like to join, you may be attempting to connect to a hidden network. Learn how to join a hidden network.
- Supported Wi-Fi configurations vary by iOS device model. Find out which standards your device supports3.
- Reset network settings by tapping Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings including:
- previously connected Wi-Fi networks and passwords
- recently used Bluetooth accessories
- VPN and APN settings
Cheers!
-Jason