Isn’t hydrogen gas explosive? Am i going to blow up?

Yes, it is VERY explosive. Hydrogen is the most energy-dense molecule by mass. But, when the gas is dissolved in water it is not explosive at all, just like if you mixed gunpowder in water it wouldn’t be explosive either. Even when it is in the air, it is only flammable above a 4.6% concentration by volume, which is not a concern when talking about hydrogen-rich water.