Advice needed. Family member with the same wedding date.

I’m going to start off by saying I have never done a post in the forums but I really need some help.


I got engaged in August of last year, announced my wedding date about a week late on Facebook, and on Thanksgiving we gave my family their save the dates ( saved a lot on stamps).
Well my cousin, who is a first cousin, got engaged in December to a woman we have not met, but they have a child together and well they decided to get married. I genuinely was very happy for them because my cousin had struggled with relationships on the past.
Well today 67 days before my wedding I get an email from my aunt ( my cousins mom) that my cousin and his fiancé picked a date... MY EXACT DATE. I am very very upset. I am not sad, I am FURIOUS. I had gone through social media and counted 9 times I had mentioned our date in posts, I know they got our save the date I handed it to him, and I am just baffled.
Now for advice... what do I do? Do I say something? Do I ask relatives what they are doing? Is it wrong to convince family to come to mine because I have had my date set for over a year? What has me the most upset is I added his fiancé on fb and she liked one of my posts about my wedding which had my date written in it. What were they thinking?!
Not only is covid severely messing up my reception plans, now I have to deal with this? I feel like a bridezilla but my fiancé keeps reassuring me that I have every right to be upset.
Also any other brides in MN who are getting married in the next few months on here? I’d love to chat about what’s going through their minds with this new mask mandate. I would like someone to vent to or even just talk to that understands me and won’t judge me and call me selfish for feeling defeated and that life is not for right now.