Belly went from hard to soft...??

I’m 26 weeks pregnant and my belly was hard ever since I was 23 weeks pregnant. All of a sudden, yesterday my belly just went soft and isn’t hard anymore. Is this normal to happen? I am trying not to worry and hopefully she just changed positions but naturally I do worry and I have felt her change positions in the past (she’s moved from one side to the other or moved up or down)... I still feel her move and kick but not as often or as strong as before. I’m just curious as how my belly went soft after being rock hard for the past few weeks strait. Has anyone else experienced this? (Also, yes I did start this pregnancy put with a little bit of a bottom pooch on my belly but nothing extreme). It still doesn’t explain my entire belly going from super firm to squishy, lol.