I got pregnant 2 weeks after coming off the pill because if you try as soon as you come off it you're sometimes super fertile. So unless you want a maternity wedding dress I would be a bit careful if you stop taking it now!
I've never been 'told off' or whatever by the GP or midwife for trying straight away and not all of them say you should wait. I think most guidelines say to leave 3 months just to get your own natural cycle going. I think the average time to conceive is 3 to 6 months (this is not specifically after coming off the pill) but obviously you never know how it will happen for you. Good luck! And whatever you do never have the contraceptive injection because that can affect your fertility and stop your periods for years.