What is this do you think?

Does this look like a kidney or bladder stone? I’ve had them before but not this large. I went to pee and had minimal pain but it was loud and had blood on it when it hit the toilet… I’ve had painful kidneys for a few weeks and haven’t had a period since February but my tubes were removed and negative pregnancy test in March… I’m not on my period and had no blood on my panty liner or when I wiped or before or after or in the toilet other than on this stone. I’m slightly freaking out what it could be and how/why it came out of me.

Thanks for any opinions!