bl, going from nothing to 3k in a month is a great achievment and something you should be proud of!
10 weeks ago and at 53yrs I started running again (didn't do much more than the C25k and a few months running last time). At first was bothered by my time (5k in 38 minutes). Now I'm more about distance, stamina, getting up those hills and guess what, without even thinking about going faster its happening without worrying about it. I'm still very slow but even after such a short time my 'average' kilometre is falling by about 20 seconds every 3-4 weeks.
The thing that helped me most was using a Heart Rate Monitor and setting it to bleep when I past 85% of MHR which was great as I'd have a walk break before my body gave in and now I can run further/faster at a lower heart rate with fewer walk breaks.
At the weekend I 'ran' 10 miles in 1hr 54mins - 10 weeks ago my record for 10 miles would have been 500 metres!