Continuous headache.

From day one there has been issues with my FMIL and my bridesmaids. Like A LOT. Finally things start to look up on Sunday with everything until I got home from work. My FH says to me “so how are we paying for the wedding?” I’m like both of our parents are paying for the rest of it and he’s like no my mom can’t afford it. I told him that I sat down with her in the beginning of March 2019 and gave her an amount if she was comfortable helping and she said yes (before I booked the venue because I didn’t want anyone to be financially strained before I signed a contract). She’s also been splitting the cost of the dj with my mom even though she told my FH she’s been making monthly payments but I have text messages to prove that she said she’ll pay X amount and my mom will cover the rest. Fine. So now 3 months before the wedding we’re freaking out trying to figure out how to pay for the wedding because now all of a sudden his mom said she never agreed to helping us. I call the venue to see about if we’ll lose any of our money and he said if he can rebook the date then we’ll only lose $500, if he can’t, then we lose 10k. I told my parents that we were potentially cancelling the wedding and my mom was like don’t worry about it, your father and I are more than happy to pay for it. I just feel so guilty that my parents are now paying for the whole thing. They insist it’s okay since they just paid off their mortgage but still. They won’t let me cancel or reschedule so we can save more for it. But my FMIL has no problem taking out (paying for) insurance on our wedding without telling us.