wireless internet connection

My wireless connection for my laptop has been working fine until yesterday. I thought it was my internet connection at first, as it's the usual cause. I've looked at the 'Network connections' icon (top right of screen near the date and clock. When I checked my network settings I got the following:

Wired Connection - Roaming mode enabled.

Modem Connection - This network interface is not configured.

I thought there should be a separate one about 'Wireless Connection' but the 2 above are the only ones shown. I haven't changed any settings and I'm wondering what the problem might be. The only other problem I've had of late is that my mouse doesn't seem to be working and I have to unplug/plug everytime until I can find out how to fix it; but surely that can't be affecting the wireless connection.