Fiance(f29) wants to put our engagement on hold after learning I(m29) got back into gymnastics

TL;DR: Fiance wants to put our wedding on hold because I attended an adult gymnastics class and because "guys who do gymnastics are usually feminine". She knew I did it in high school, but said it was "different back then" because "no one knows what they want to be yet". However, she said that I'm "possibly not straight" and "never had a chance to explore such feelings" due to my religious upbringing and possible fear of being reprimanded, thus why she wants to put the wedding on hold

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We met each other in college, but have been dating for the past 5 years. We had to push back our wedding date due to covid, but finally rescheduled for the early part of this year after some drama with her parents. Long story short, her parents are vaccinated, but they didn't want anyone to know that they were. The only reason they got the shot was because they wanted to go to their vacation home out of state. But, when it came to the wedding and our request that guests be vaccinated, they told family and friends that we were wrong (among other expletives) to request that and that they weren't vaccinated, not to mention berating others who stated they were vaccinated. It caused a lot of stress as some people dropped out from attending as a result, but I tried my best to assure my fiance (Nicki) that I didn't think of her differently because of her parents, and I've told her that many times too

However, the stress has crept into other areas of her life such as her job and certain people who saw her parent's messages that she was tagged in, but it's also crept into an issue with me that she recently told me about too. She said that she wanted to put the wedding on pause after getting flack for rescinding her parent's invitation, and I figured that maybe we could do a smaller thing with less than 10 people and without those involved in the drama. However, one of the reasons she included when we spoke, was the fact that there was something about me that bothered her too, and when I asked what it was and tried to explain, there was just no changing her mind. Maybe it's the stress of everything, who knows. That's the reason I'm writing this now, to try and find out

In-between my work schedule as an essential worker last year, I returned to an old hobby besides my usual gym routine, and she knew that I used to do gymnastics when I was in high school. After finding an adult program that allowed me to get back into what I loved/missed, I simply signed up and began going for a few weeks, and it was really refreshing in the midst of all the craziness. However, when we spoke, she said that that's "been on her mind for some time" and that "while it was fine in high school when I didn't know what I wanted to be yet", it bothered her that I got back into it and made her question if I was straight. I told her that that surprised me and that I was straight, but she said she "wasn't sure" and that my religious upbringing (not religious now) could've made me "afraid to explore those feelings" because of my parents or fear of coming out when we attended church. She also said that guys who do gymnastics are "usually feminine", to which I told her that that was an assumption/stereotype, but she said that she needed a break to reconsider everything. Maybe it's the stress from her parents pouring into other aspects of her life, but I'm honestly not sure. She told her parents that she's going no contact with them recently, so maybe her issue lies solely with me. Regardless, it's been three days, and I haven't contacted her as she asked. I just feel alone and confused as to what her issue really is, and I want to ask what I should do from here. I've considered therapy and talking to someone, but while I'm considering my insurance options in the meantime, I wanted to ask how I should proceed here first and what I should do in the meantime until hopefully connecting with someone