congratulations @Colliedogwalker !
best case scenario, you’re still pregnant and it may still be a lovely day although you might be a bit tired and obvi not able to drink as much , everyone is different but that would be a no no for me.
other scenario is - Baby could be early and there could be complications with either you or baby. Newborn jaundice is very common where they need to go back into hosptial and have light therapy. My baby didn’t put on weight as quickly as she should have done - we managed to avoid a hospital admission but some parents have to go back in until they’re feeding properly.
If you’ve had the baby and you’re both fine physically, you will be in the newborn trenches of exhaustion which I think is made worse by breastfeeding. (I say this as someone who bf for a year and am extremely pro bf) I didn’t realise this but a normal breastfeed is anything between 15-45 mins long, then a lot of babies need to be burped or held up for 15-30 mins after that otherwise they vomit everywhere. You may be hormonal. I certainly was and fiercely protective - I was happy for people to hold my baby but the minute she cried I wanted her back in my arms - I was the easiest person to settle her because I was bf. This did calm down within the coming weeks but for me the hormonal instinct was intense like a lioness with her cubs. I just wouldn’t have wanted to go to anything that wasn’t relaxed and on my terms whilst feeling like that.
The other thing you’re maybe not considering is this newborn will have no immunity at all. I know you’re due in summer but I would still rather the bay is not passed around loads of people who may have bugs when they’re so tiny. Maybe you’re having a smaller wedding so not an issue but if baby get sa could or a cold when so tiny it’s just another bad nights sleep to deal with plus you feel awful for them - they can’t clear their own noses or anything.
Maybe you are planning a very different wedding to mine - whilst my wedding day was the best day of my life - it didn’t feel calm and relaxing - you’re up early doors for hair and make up, with photos, need to grab something to eat, then ceremony, trying to catch up with all the guests, more photos, more small talk, dinner, speeches, cake first. Dance, more guests arrive, more small talk - i loved it but it was the least low key day of my life. Personally I would want to avoid anything remotely like that when you may have a 2 week newborn. You need rest and snacks, fluids and maybe pain relief depending on how your baby is born.
i know you say you’re speaking to vendors - for us the majority of the costs were paid 2-3 weeks before and it was only deposits at this stage - which is Ofc annoying to lose but that’s life. I genuinely think it would be so much worse to go ahead with this plan