Plenty of time to go, in 3 or 4 months you'll get another mile in in that time 
I'll echo from your other thread - slow it right down and get a HR monitor. If you haven't got one, I highly recommend a GPS watch (I use Garmin) so you can automatically log your paces, distances and routes along with your HR and you'll see yourself improve.
I felt the same when I started, but by the 3rd week I could feel the improvement. The important thing is not to get injured, or push too hard at the start.
As you're running - you should hope it's all "downhill" from here! 