34 weeks cramping and lower back pain?

I was showering and out of no where started feeling really bad cramping on my lower abdomen. I had to get out of shower bc pain was getting really bad and when I did, I started feeling cramping all over my lower abdomen not just left side and it was accompanied by bad lower back pain as well. I spent maybe 10 minutes in pain, but I laid down and elevated legs and I’m not feeling the cramping anymore just a bit of back pain. FTM here, has anyone else experienced this? I don’t know what it was but I’m just glad I feel good now and baby is moving away.