Hey, I'm just adding to this thread because I relate a lot and I'm massively stressing today and hope that if I type it all out I might feel better afterwards.
My DD is 11 now and I've always been anxious about her health - in my head, every symptom is a sign that she's developing a serious chronic health condition that will destroy her life. I'm absolutely exhausted at this point and so tired of trying to 'act normal.' I desperately didn't want to pass it on to her so I probably take her to the doctor less than a lot of mums would, but the effort it takes me to contain my panic is just breaking me, honestly. It doesn't help that she's highly anxious also, about everything, and her whole nervous system is always on high alert (little playground falls get her so worked up and crying, stuff other kids would just run off). She comes to me in a panic about symptoms and it takes all the self-contorl I've got not to instantly buy-in and started freaking out myself.
It's been quiet for a few weeks, but then last friday she tried to stop a swing full of kids with her foot and badly twisted her knee. She called me in floods of tears and panicking and i went to get her from the park, shaking and feeling nauseous myself because I was convinced she'd broken it. for context, I have terrible chronic pain myself which I know is stress related and I'm terrified of her injuring herself and then just never healing because that's just the kind of people we are, our panic makes our bodies hold on to pain and injuries - she's always getting migraines and tummy aches and growing pains and just every damn thing. Anyway this knee had swelled up a little bit and she had a big bruise and was limping so I took her home, iced it, elevated it, told her to rest it. I didn't take her to minor injuries because every time we go it's always nothing and she's just blown it out of proportion and I'm sick of them looking at me like I'm wasting their time (she cries at the drop of a hat and feels pain very intensely so even a minor thing will feel awful to her). She was limping a little bit the next day but it looked a lot better and I thought, okay, I'll drive her up to school, she can skip PE, sit on the bench at break, rest it again when she gets home and she'll be fine in a few days. But no. It keeps getting a bit better, and then getting worse again, and then better, and then worse. It's been a week now and I'm so fucking scared that she's damaged it permanently somehow. Like, I know it's probably fine but I'm just so scared. Plus I know that if I show any of this fear in my face or body language that she'll pick up on it and start freaking out too, and then it will hurt worse and heal worse because her mood really affects how she's feeling. If she's worried that she'll never get better, then she won't, she'll be limping on that knee for months and that'll be her whole summer down the toilet.
And she drives me crazy because on the one hand she's panicking about this knee, but the minute I say she has to stay in or miss a school day or activity or whatever, she acts like its the absolute end of the world, all tears etc. But if I let her go and see a friend, absolutely insisting that she rests it while she's there, next thing I see she's on tiktok running around and dancing like a loon!!! Then she's home afterward and it's swollen up again and she's crying. I just can't with this anymore. Sorry this is such a rant but I'm just so tired of being terrified for her and also trying to manage her volatility, I just want to leave the country for a month and then come back when it's hopefully all better!! AAGGGH!!!! Her dad's keeping an eye on her right now because I just couldn't cope another minute longer watching her limp about. I'm googling wondering if I need to be on anxiety drugs now. I have propanalol already but it just puts me to sleep which isnt' ideal when you still need to do things. I just don't want to feel so awful all the time 
Thanks for listening