2 * 0 = 0

Doubling the mass of photons is no change.

Repealing Bournoulli's principle requires changing how kinetic collisions of molecules translates into bulk measurables like pressure and density. There's no way to predict what that does without first specifying more about what changes are made.

[note: I thought the OP said "proton"]

Best case? atoms shrink slightly and some changes to how chemistry works

Realistic case? The change in nuclear binding energies renders protons unstable, making many elements unstable or radioactive. All matter suddenly becomes much heavier, changing gravity and internal pressure, which in turn disrupts stellar and planetary structures. Fusion reactions depend on precise mass differences between particles, which may alter how stars generate energy, or completely prevent them from forming altogether. Additionally, since proton mass is tied to the strong nuclear force, it will fundamentally alter physics, and it's likely that protons will decay into neutrons, preventing atoms from existing at all.

The first wish would affect how fluids act under pressure, including how our blood would move throughout our bodies. Depending on the exact effects, the wisher may not even get the chance to make the second wish because their blood would either stop moving, or they would drop to ground as every capillary in their body ruptures causing an immediate loss of blood pressure, quickly followed by loss of consciousness and then death.

IF they live long enough to make the second wish, then they probably wouldn't live long enough to make the third.

Its turns the universe into a nuke...

Who says pi has to be a constant at all?

Pi can be equal to whatever you want, as long as you’re using a number base that accounts for it. Pi is only an irrational number because base-10 is a rational base. You could create a number base that sets pi equal to 1, if you wanted.

Nah, except if you are in a plane

Although I am not sure if anything in the human body relies on the big berni, but if not you are golden