Period coming

Ok ladies tell me it’s not just me , can y’all tell when your period is about to start and if it’s going to be bad ? Bc I think mine is about to start bc I’m having pms symptoms and I think my body’s trying to warm me it’s gonna kick my booty and I think it going to start soon bc I’ve been off my pills for 4 weeks now so yea it’s about time for my period! And what does it mean if you see a shadow line on an opk and a pregnancy test? Does that mean it’s positive? Like I took an opk yesterday and I saw a second line but it was super faint when really all my lines on all my test have been faint clearblue digital and first response! But it scares the crap out of me bc I’m not ovulating but you guys did tell me and the internet told me that it could take a couple months for your body to ovulate again but I just hope that I can have another baby when we try again !