38+5 weeks pregnant and been having what I think is contractions for the past roughly 4 hours, they feel like very strong period cramps? But I haven't had a mucus plug or my waters break so I'm unsure. I've not been able to get any rest at all. I've been using an app to time then and they are now average duration of 32 seconds and average frequency of 4:12 minutes. I was only at the hospital for yesterday reduced movements so only want to call them if I really need to. Is now a good time? Any advice?