Lower back locked and 31 weeks

I remember this happening the day I ovulated (that I had gotten pregnant) back in July. The back pain started when I put legginings on I squeezed my butt pushed my hips forward and got a weird pain but went away. As the day went on the pain slowly got worst hurting more and more when I transition into different positions like sitting to standing or bending or trying to bend to use the bathroom or get out of a car. It peaked with the pain at the end of week 1 and didn't start to feel better for a whole month! I couldn't take care of my newborn i went to my family doc and he was sending me to pt but I never went because by the time they got me in I started to feel better.

Well started two days ago the pain is slowly coming back. I didn't do anything this time for it to start. It's like not a consistent pain, it's a stabbing pain in my lower spine whenever I move (roll over, bend, sit stand walk, etc) but a constant soreness on my entire lower back.it hurts to lift my daughter now, or do anything. Sometimes when I move positions I feel a pop in my lower back but nothing gets better. As a matter of fact massaging it makes it hurt and feel more stiff. It's not at the worst it can get yet but im afraid of it getting to the worst point as I don't want to go on leave early. I looked up stuff on google and the only thing I can find is maybe facet joint pain?? Has anyone else dealt with a similar situation?

I'm going to tell my doc when I go to see them. This is my 4th pregnancy and I'm currently 31 weeks every time I got the epidural it was worst then a contraction and I have a high pain tolerance. I had my most recent daughter 10 months ago and when they went to give me the epidural the anesthesiologist was making a comment about how my spine, lower back area was super swollen and get pushing on it.

Sorry about the long post