Hi
It may be that you are running a bit too fast in training - most training plans have you running at a nice easy pace for most of the weekly runs with just one faster (tempo) run and some quick sprints on another day.
If you feel it is hard work then just slow down a bit - go out slow, keep slow and if you gradually pick up the pace then fine but as soon as it starts to feel hard then slow down again.
What worked for me is to just gradually work up to running 10k - ie going from 5 ot 6 ot 7 to 8 to 9k but doing it slow. Once you can do 8 or 9 k at a nice comfortable pace then you could start to make eg the middle few k faster.
But a month to go is still ages really - as it sounds as if you have plenty of opportunites to train. Maybe you should have more rest days ie don't try a 7/8 k unless you have had 2 rest days and it is worth looking at training plans - you maybe surprised how little fast runnning they suggest and how short some runs are.
To do your first 10k after only 6 months running in an hour or so is still excellent and if you keep going then years down the line you will find you are so much fitter and faster - but it is still early days too!