Tough pelvic region? Anyone got any ideas as to what it could be?

I noticed when I stand up and feel above my pelvic bone, it is very firm. I have recently lost about 10lbs, not sure if that has something to do with it.

It could be that I never noticed but I had a pregnancy scare so I started feeling my body lol. But got my blood test results back and have an HCG count of

I've also been extremely constipated with weird twitches in my pelvis and abdomen. Not sure if that could play a part. Anyone else can relate or am I overthinking?