Good luck, try not to let others stress you out, easier said than done! I agree it is difficult but talking to others who do not understand can be stressful!
I'd also recommend, if I were you, just trying to get to grips with why you are putting on weight or not lossing it. I know, I am overweight, a lot, so am not saying I know the answers, I don't! But I think if you are eating because of bordom or whatever then you can find some ways of coping.
I too love food but found I was impulse eating, I'd see something and want to eat it and felt I could not stop! But if I just resisted the temptation for a few minutes I felt better and could avoid the food! I've started a couple of threads about it in the slimming threads. if you are intersted feel free to take a look at:
[http://www.mumsnet.com/Talk/big_slim_whatever_weight_loss_club/1191480-Anyone-struggling-with-compulsive-ways-of-eating-Anyone-getting-any-answers?msgid=25030726#25030726]
and also [http://www.mumsnet.com/Talk/big_slim_whatever_weight_loss_club/1160452-Can-anyone-recommend-a-good-book-on-emotional-or-comfort-eating-please]
But the weight issue is not such a big deal, I know a lot of larger people and even quite fat people who have got pregnant so it is not necessarily an issue for your fertility.
I really recommend Zita West.
[http://www.amazon.co.uk/Fertility-Conception-complete-getting-pregnant/dp/0751338656/ref=sr_1_1?ie=UTF8&qid=1303773753&sr=8-1]
[http://www.amazon.co.uk/Zita-Wests-Guide-Getting-Pregnant/dp/0007173717/ref=sr_1_3?ie=UTF8&qid=1303773753&sr=8-3]
I have not read these books, but I have met Zita West and she seemed great, I think I heard her speak at the fertility show in London about 18 months ago.