Feel like I can poop

I’m almost 4 weeks pp. I feel like I have to poop, but when I sit on the toilet, it’s like I can’t push it out. This has been going on for like 2 weeks. So since I can’t physically push it out, it all builds up and I feel like I’m going to explode.

I’ve tried stool softeners but it still feels this way.

Is this normal? Any suggestions?