iPhone 4 Crash Increase on iOS 5iOS5.1.1 .

Has any iPhone 4 users been experiencing more crashes than normal? I cannot open Facebook or Twitter on safari or their apps. My iPhone acts as if it's loading the page data up then the screen goes black and safari crashes. Same with their respective apps. It's as if those two pages overload my phone. I had this problem with iOS5 and it's recent update iOS 5.1.1. Today my phone crashed 23 times in a row (yes I counted!) before I gave up trying to open them.

Along with the two issues above, I noticed if I send any iMessages to anyone during the time I am experiencing the high number of crashes, they delete off my phone AND the recipients phone. They will deliver, but when I open iMessage after a crash they will have gone.

Last week I plugged my phone to iTunes and did a software upgrade and imediately started having the issue, then within about two hours of upgrading to 5.1.1 I I had to do a software restore because it was SO bad. It solved the problem for all of about NEVER lol I thought it might have something to do with the ram needed to run those apps and load those pages so I deleted ALL my images and loads of apps I don't use, that only increased my storage size. When I started experiencing these issues I had about 4gb left of my 16gb storage, after a restore and clean out I had 10gb.  When I started experiencing the problems I was still on iOS 5.0 I'm now on iOS 5.1.1 and it's gotten worse and thrown the new issue of iMessages deleting that I have sent in to the mix.

Lastly, I noticed its not a constant issue. I will have a series of crashes, my phone will act incredibly slow, iMessage deletes messages etc, Facebook and Twitter don't open, in fact my phone will crawl so slowly it's pure agony, switching my phone off and the back on doesn't help, and then it will suddenly work again. Like today, I was out sat in the huge post office queue and tried to use Facebook via safari and it kept crashing, happened over and over, it was like this for about 30 minutes, then it sorted itself out again and now I am at home I can use Facebook via safari.

Come to think of it, could it be related to the fact that I was trying to load those apps and we pages up on 3G and not wifi?

Sorry for the long post but any suggestions or help to remedy this issue would be great.