40 weeks, 1 day, started feeling my stomach like during periods since …

40 weeks, 1 day, started feeling my stomach like during periods since yesterday, and it's giving off a little in the back passage, very unpleasant sensations. Yesterday I saw a doctor, they gave me an appointment for the hospital on Sunday, tomorrow I have to do a bunch of tests, prepare, another COVID test on Thursday, I had it before at 37 weeks, the plug didn't go away, the belly didn't drop, I don't know what to think about it, contractions are real or just light ones, with the first child there were not such feelings, and I don't know what this is, it was planned C-section at 39 weeks 4 days, can