Afternoon @Fluttershy1 , I'm really sorry to hear that you're struggling so much with your symptoms at the moment. And having to hide it certainly makes things even harder. Have you been able to identify if there's anything in your environment or that's happening in your life that is triggering you at present?
SANE actually has a blog post about coping with flashbacks, which you can read about here. Some suggestions include grounding and progressive muscle relaxation. It's also helpful to remind yourself that you are no longer in that situation - you are in your safe space, in the present moment. I hope you've been able to bury yourself in a pile of fuzzy friends or warm blankets! 
maybe re reading the information again from @Jynx may help my @Fluttershy1 xxx
sitting with you through this
Well I'm glad you're reaching out @Fluttershy1 , so you don't have to feel alone when you're in this rough patch
@Shaz51 is on the money - you are so strong @Fluttershy1!
Your heart might be a-flutter, and that wouldn't help. Maybe give the 4-7-8 breathing technique a go? It's a good one for slowing the heartrate, and soothing anxiety
Help us push aside the stigma and discrimination surrounding complex mental health and change the way people talk about, and care for, mental illness.
SANE acknowledges the Traditional Owners of Country throughout Australia and recognises the continuing connection to lands, waters and communities. We pay our respect to Aboriginal and Torres Strait Islander cultures; and to Elders past and present.
SANE values diversity. We are committed to providing a safe, culturally appropriate, and inclusive service for all people, regardless of their ethnicity, faith, disability, sexuality, or gender identity.
Help us push aside the stigma and discrimination surrounding complex mental health and change the way people talk about, and care for, mental illness.
SANE acknowledges the Traditional Owners of Country throughout Australia and recognises the continuing connection to lands, waters and communities. We pay our respect to Aboriginal and Torres Strait Islander cultures; and to Elders past and present.
SANE values diversity. We are committed to providing a safe, culturally appropriate, and inclusive service for all people, regardless of their ethnicity, faith, disability, sexuality, or gender identity.