My Internet keeps lagging on my iPhone 4?

Ok so about an hour ago, my Internet on my phone (I'm connected to my home Wi-Fi, so it's always strong!) like I'm trying to send iMessages and usually they send strait away, but now my Internet keeps connecting & reconnecting, so it'll be like 2-3 mins without any messges, and suddnely I get like 10 messages of my friends saying "r u ignoring me" and stuff.

Ok anyway, I noticed it since I've been watching a film on my iPad. There's alot of things connected to my home Wi-Fi, my iPad, iPhone, and my sisters laptop (which she's on) but its never done this before?

I've tried turning Wi-Fi of for like a Miniute then turning it back on again! My phones relatively new, like I got it 2 weeks ago!

Reset all setting on you iphone

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