Ruth Morse, from Halesowen, West Midlands, was due to marry her partner in Cyprus on 8 October, but now doubts the wedding will go ahead.
She booked the whole event through Thomas Cook, including the decorations, the cake, wedding venues and a private bar.
And of the 44 guests due to attend, about 25 booked their flights and accommodation through the travel agent.
"At the moment, Thomas Cook have not been in contact, so we are in the dark," Ruth says.
"I know we are protected by Atol, but I'm unsure about the things we bought from third parties through Thomas Cook, like the decorations. They cost me £4,000."
Ruth says she had planned her "dream wedding" for two years. What makes it doubly hard is that much of the money she spent came from family members, including her mother and her late brother Ben, who was
murdered in 2017.
"From the grief we had, we pulled ourselves together to arrange our dream day," she says.
"We will rebook the wedding, but I won't do it abroad again because I have lost faith. I feel completely devastated by all of this."