Is 70/40 Blood Pressure really bad?

Yesterday for the first time in my life my body went into shock.

My vision blurred I couldn't see 3 feet ahead of me.

I was struggling to breath, I dropped to the ground a few times as I was outside.

I vomited 3 times

As soon as I got home I called the ambulance, was just me at home.

They gave me piriton injection, they couldn't get a vain because my blood pressure was so low, tried 3 injections.

My blood pressure dropped to 70/40 what does this mean?

Then they gave me a shot of adrenaline in the leg and shortly after that I felt better.

Was it really that fatal?

The nurse said I could have died if I didn't have the injections and wasn't rushed to hospital.

But I feel absolutely fine now. All this occurred about 24 hours ago exactly. 2:30 - 3am

This has never happened to me before and I'm actually very healthy.
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Age: 21 Male
Is 70/40 Blood Pressure really bad?
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