I gave a buddy a pep talk last night and I will give you one too :-)
try to focus on the marriage and love - it really is a special time of its own (of course you want to start trying duh - but weddings are about you and your man).
Its so great he is willing and positive and allowing you to do what you feel you need to (mine wasnt so gracious believe me, you struck gold). I would cherish the time and love around you and him as its going to be so hard when you have kids.
Just imagine how awesome it would be if you were just pg or 2 months - you wouldnt be showing and you would have a special glow about you - something your pictures will say for a lifetime .....
take your time and enjoy this step as it gets hectic and crazy....also remember you may be feeling yucky in your first trimester so i would hate to be stressed out with work, planning a wedding and feeling awful.
if i were you, i would wait a month or so more........
good luck and sorry if i was blunt

- i am older and tend to say things straight - ultimately its your decision but remember when you are young you have less patience - not always the best road sometimes....
good luck honey :-)