Posted: 08/03/2016 at 17:39
When you say you could only 'hack' three minutes, why, was it the weather or road conditions ?
I am guessing that you may have started too fast, so first you need to find a pace you are happy with (you should be able to run and hold a conversation), maybe do a walk / run e.g walk to one lampost then run to another and small increases after that ..two lamposts running one walking etc...ensure you warm up before your run and warm down afterwards hopefully to fend off injuries
8 weeks is doable as you don't have to get to 6.2 miles in training (that's just for the race) aim for 5 miles, with the knowledge on the day/ race conditions will get you to the finish line
Good luck and just take it easy if this is your first race, just enjoy the atmosphere any time you complete is a PB, start towards the back as you don't want to get in the way of the faster runners (besides you will be surprised how many people you overtake)