iPhone 6 odd behaviour with IOS 8.4.1

Hi,

I've recently been experiencing some odd behaviour and I'm not sure now whether it's my phone or bugs with IOS 8.

It started with Safari being very odd, I'd be unable to search, it wouldn't load, I wouldn't be able to access the multiple pages or close them. It was extremely frustrating and it didn't seem to matter if I was on wi-fi or 4G.

The Safari issues have since resolved, and will hopefully stay that way. But instead of that, it's now issues with the App Store and also accessing certain options within Settings, like iCloud and the iTunes & Apps options.

I've had my iPhone 6 since it came out, and have never once had a problem with it until the last few weeks. When I try to get or buy an app, it just circles and circles until the App Store crashes and returns to the home screen, or I have to press the home button until it finally lets me close it.

I've tried restarting, made no difference. Then I thought it was perhaps not enough space - so I made sure there was, then I reset my network settings to make sure it wasn't a glitch with my network as we've recently upgraded to fibre and so it has a new setting/password. This didn't make a difference.

I was going to log out of my Apple ID and back in again, but as I say, I can't even access that option in settings now.

Is this my iPhone messing up, or is it IOS 8 messing up? The phone is up to date, currently on IOS 8.4.1 - is this now a common problem for people? I'm so frustrated with it, Apple are starting to really annoy me, not long ago it was Apple Music messing around for days. If these is going to be common problems from now on I think a different phone is in order.

App Store appears to be working fine on my MacBook Air, so it's obviously either the phone or the IOS 8.