I need help sir / mam.

Hlo sir /mam last few days I am constantly feel like my brain hyperactive it's feel like heightened sense of threat even there is no threat and I feel like constantly in fear 24/7 please tell me what is this my blood test all normal am not able to relax not sit on one place with relaxation it's feel like brain in fear and not able to came out from this fear I try meditation yoga but am not doing meditation due to fear and not able to sit on one place and feel like my breathing hard and heartbeat feel fast and sir mam what is this constantly fear like my brain constantly hyperactive like ever second of day am in fear without any thoughts I feel like a ghost in front of me and am in fear not able to relax ..and can this life threatening chances of stroke or heartattack due to constantly fear please help me mam sir am die from this please it's scary due to constantly fear like heightened of fear in me Please help me doctors it's spoil my life constantly 24/7 fear living 😭😭😭😭 please