DC every 20 mins - stuck on connecting

[envisage]

So I'm lvl 13 and everything has worked fine up until yesterday evening when I started to DC randomly once every other hour or so I'd say.
Today however I DCed like 5 times during an RFC, 3 times prior and now 3 times after. So about 11 times in 3 hours. It's only me in the party DCing and my internet connection is stable and fast, so it's not that.
Once I DC I get stuck in Connecting (and every other try no texts comes up at all except for the Cancel-button) for about 5 mins until I can Connect and resume playing for about 20mins until next DC.

Has anyone any ideas to how to solve this or experienced anything similar?
I might add I've never experienced anything like this on other games or private servers, wither vanilla, tbc or wotlk.

Please advise

[piehead]

Sounds like something to post in the Support Section.

[envisage]

Thanks! I saw it was moved there now.

I might add that I don't use any addons, WDB-folder has been deleted, I've nothing else running in the background that should make an impact of wow...