Could be something dumb like ligament pain but I'd mention it to your doctor/midwife at your next appointment.
I had it all the time & my dr told me it's normal to feel pressure , the pressure I felt was like bad . I felt like my baby was ganna come out but she said it's normal & that it only gets worse . I still feel pressure but not as bad .
Sounds like ligiment pains, but if you start to bleed or the pain gets worse contact your health care provider or go into your nearest emergency unit right away.
Yeah the pressure I felt last night was bad I was terrified to use the bathroom but as soon as I peed, I felt fine.