i’m 20 weeks and i just started having this pain, it hurts when i stretch out.

not sure what it could be? i got scared and went to L&D bc I was scared of preterm labor. Everything seemed okay. they checked for a UTI and it came out negative. I’m currently waiting for my blood test.

I have pain on the middle right side of my back, by where my mid back ribs are and it sometimes radiates to the side. It even hurts when I lie down on my left side, and hurts EVEN MORE when i try laying on the right side. It comes and goes and I have a hard time sleeping at night but I sometimes feel it in the day time :( it’s just one-sided pain.

what is this? has anyone had this pain before?