Need some advice please!!

Lydia • 19.. TTC for my first baby.
Hello :)
I'd really appreciate if someone could respond to this.
The past 3 nights I've been feeling really nauseas as soon as I lie down and get in bed. I've also felt really bloated for the past week.
Last week I had pink spotting in my cervical mucus.
My period is due 21st according to glow, but my last period was the 17th so that's quite a long cycle...
My boobs have been kind of sore (they're fake so I can't really feel them anyway haha) and I've been having really bad cramping pain in my lower left side, it feels like my ovary as silly as that sounds.
I have been TTC since January!
Could anybody give me any advice on the way I'm feeling and why?
Thank you so much.. Xx