Okayy wait is over!
Combining quantum physics and general relativity is so hard. For example these laws break down when it comes to extreme densities of blackhole or big bang singularities. Special relativity and quantum mechanics do merge well and no problem with that right

We know that scientists came up with the idea of string theory but is that the only one way? Well I guess not. Another idea is loop quantum gravity (LQG) . Loop quantum gravity has two main principles of general relativity
1. background independence

What is background independence? Let's see with an example - suppose you're writing in a book(space) , it has a definite shape (flat) and boundary. But in loop quantum gravity , you make no assumptions on the nature of space. Whatever you wrote on paper can exist independently or

They can bend and change just like general relativity. The second principal is diffeomorphism invariance (interesting name right?) It means what's going on in space depends only on THAT point in space. Now here comes the math part. It does not need to be continuous now.

And what happened when they did the math? Space and Time are continuous or quantised?
The conclusion - The space and time are QUANTISED!
And so the core consequence of loop quantum gravity is smallest bit of space and time.

Now how to reach general relativity from here? Take a bus? Jump? Walk? Naah kidding. When you add mass and energy you can distort the shape of little volumes. You're bending space and time, you can distort the space in such a way that the volumes are unchanged.

There are no ways to test this theory right now but we might find one or maybe not but diving deep and searching for answers is what keeps us going.