27wks feeling the need to push

Okay has anyone had this. Just now was the first time I’ve had this. Over the weeks I’ve been having a ton of pressure on my lower abdomen and inside my vagina. Been getting plenty of Braxton Hicks. But last night there was so much pressure it was hurting and I couldn’t get comfortable in any position I laid in. And then this morning I’m getting what I guess is lightning crotch but seems different than the usual. It’s more of an ouch feeling like tearing or something and I felt like maybe I had to pee so I sat down and barley peed then all the sudden I got the urge to push from my vagina. I didn’t do so and I stood up. I swear there was a tiny bit of blood on the toilet paper along with lots of mucus that looked a bit like part of my mucus plug I guess. Then when I stood up I’ve been feeling immense pressure and pains inside of my vagina like my vagina is almost Charlie horsing or something. I’m laid down on my left side currently but I am still feeling these pains come and go. Anyone else have this? I have an ultrasound in 2 hours with my high risk doctor so I’m going to have him check my cervix to make sure I’m not going into labor. Also over the past few days I’ve noticed my bump has gotten significantly Smaller. Still feeling her move though