Part of mucous plug?

This has been happening for a few days now. I’ve had threatened preterm labor. I’m currently on bed rest because I’m constantly having contractions. The past three days I’ve had cramps that feel like bad period cramps. It wakes me up at night. It started off like the first photo, i looked in the toilet and there’s a lot more mucous than I’ve had before. I’m dilated to 2 since last week, -1 stage, and 80% effaced. The fetal fibronectin test also came back positive last Thursday.

Should i be worried? I’m 34 weeks & 5 days