It looks as if you were trying to describe the beginning of the universe as the "implosion" of an initial mass.
The first problem that comes to mind is the origin of that initial mass. Then, a more serious problem, from GR, is the fact that there is plenty of evidence for the current model of the evolution of the universe some time after the BB. This means that there was an expansion at least at some point after your "initial mass" was just hanging around. As a result, you would need to explain how is it that GR "kicked in", and why it had not before.
In any case, it is good that you are thinking about this problems. If you seriously want to pursue them, there is a lot of learning that you need to do. Just getting a "negative sphere formula" won't cut it.
Just to give you an idea of what seems lacking:
Newtonian mechanics (for which you need to learn calculus, which requires in turn approx 1yr of hard work) describes the motion of cars, projectiles, stars, planets and many others to maybe 1 part in a million. That means that a new model for things should have at least that precision.
General Relativity (for which you need lots of other math, maybe 1 more year of work) gets the last digits right. Let me elaborate: in some cases, Newtonian methods fail by more than 1 in a million, more like 1 in a hundred, or even 50%. In those cases you need a better model, and GR provides it. It gets right the last digits. In very special situations, those "last digits" are noticeable, or experimentally visible. However, in the rest of situations, the new theory (in this case, GR) still gives results that are compatible with both the old theory and experiment (within the experimental resolution).
Your idea of the "negative sphere" sounds interesting, but it cannot go any further without a solid link to physics (i.e., experiment) and a much wider framework. The BB model is not a concoction made out of a nice sounding phrase. Instead, it is the result of the following process:
Out from a lot of (gravitational) experimental data, a set of "basic laws", plus a method to obtain predictions from them, was found (Newton's mechanics).
From electromagnetic and optical experiments, a modification of the idea of space and time came along (Special Relativity, or SR).
Trying to extend SR, a new, more accurate, theory of gravity was obtained (General Relativity, or GR),
Then, with a solidly supported set of "basic laws" for the behavior of gravity, people investigated what those laws say about the beginning of the universe.
What they say is what people know as the "Big Bang model". It is not only an idea. It also makes various predictions (among them, the precise energy composition of the cosmic microwave background radiation, and the relative abundance of many elements in the universe), and they were confirmed with an excellent precision.
There are still many open questions in the model, for which it would be great to have new people come and contribute their efforts. However, in order to get to a point where you can contribute, you need to invest some serious time in math and physics. It is a fascinating enterprise though, worth the time and work.
) and you are trying to tackle problems that are so difficult. Big Bang theory requires a fairly advanced knowledge in math and physics.
