weird head rush while high on marijuana?

Alright, sooo I'm really high right now... and for the past three hours I've been having weird headrushes + an extremely fast heart beat + shortness of breath + shakes and shivers....

I literally thought i was gonna die...

ANYWHO

so 10 mins after I smoked up , the high hit me like a train.

then my vision became like a strobe light.

My heart beat got faster and faster, I put my hand on my heart and I could literally feel the giant waves of blood being pumped in and out of my body, as if there were a bubble going through my veins... then my face and nose felt as if I were extremely congested and stiff almost...

then My heart would gradually get faster and faster, and as it got faster, the less I could breath...

THEN there was a head rush when I couldn't breath anymore, mostly centred at the top back part of my head, then I went into the normal high I get... My heart beat was still somewhat fast though

... this "phenomenon" up here has been occurring to me every 20 mins for the past 3 hours...

I'm scared as ****...

please help lmao