ipad won't connect

So..... here's the deal.

Our iPad has been working fine for years.

Last night, we activated Netflix on our Samsung TV for the first time- the TV wouldn't connect to wi-fi, so I inputed the IP address from our iPad onto the TV, and voila, Netflix connected...... but now, our iPad won't connect to wi-fi anymore!!! The wheel just keeps spinning and spinning, like it's searching for the network- and when I look at the network settings, there is now a different IP address listed?!!!! Help!!!