Is this a sign of pregnancy Orrr?? (TMI)

🌿🍒;Lyiah;🍍🌿 • I'm 18, engaged to my amazing fiancè 😍 and ttc for baby #1 👶💘
So obviously (tmi) but I need opinions.. I have PCOS so this discharge is pretty uncommon for me (especially the amount of it, the color of it and how stretchy/sticky it is) anyways for the past 2 months I've had regular cycles & both times AF was on time.. This month I'm a week late.. I've took 3 pregnancy test but all (-).. I'm cramping sometimes mild and sometimes sharp. I'm having lower back pain, I'll get nauseous on & off and this discharge will go from light to medium, but it won't go away and I've had it for about 2 weeks.. And Wednesday I was scrolling through fb and seen a picture of a baby rabbit and started crying because it reminded me of my dog 😂 (stupid but funny I know) but I'm hardly ever THAT emotional. Can someone please tell me if this is normal or what may be causing me to do this?