I have heard of this test where it bubbles or doesn't, but don't stress your mind over these unreliable things. Just keep your mind peaceful, pray, and get a doctor's test done when the time is right. God will keep everything beautiful, take care of your health first.
Beta, earlier people used to do all these things at home using baking soda just for fun, but there is no guarantee of these tests. If you want to confirm, always buy the proper card test from the chemist. Meanwhile, take proper rest and drink warm milk at night if you have mild nausea.
Honestly, those kitchen tests are a waste of time and baking soda. A basic UPT card costs only 50-100 rupees at any chemist and gives real results. Save your energy and budget for the proper ultrasound and clinic registration later, which is where real planning starts.
It's some old home test where you mix urine with baking soda to check if it fizzes, but honestly it has no science behind it. I'd say skip the stress, focus on a light walk or some prenatal yoga if your gynac has cleared you for exercise. That's much better for peace of mind!
My hospital nurse clearly told me these kitchen tests are totally unreliable when I asked out of curiosity. If you are doubting, just get a proper beta hCG blood test done at a good lab. You can ask your hospital team to guide u, they explain the scientific tests properly.
I remember being so desperate to know that I almost tried all these weird internet hacks, including baking soda! The anxiety before seeing those double lines is so real and emotional. But trust me, wait for a proper urine kit test, it's the only way to feel sure. Hugs to you.