Waking up every morning with chest hurting in a startle

[Live_free]

I do have anxiety, I take Zoloft for it. But sometimes I wake up around 4/5 in like a panic for no reason. Chest feels heavy and hot flashes which makes me freak out more. I could only be asleep 4 hours and I wake up out of nowhere. It's not like a major panic attack startle wake up freaking out but it's like I feel so restless and grinding my teeth just feel really anxious with it and it starts to freak me out where I start getting depersonalization/ derealization. Freaks me out. It's weird. Anyone else?