Question about cervical mucous

What the difference in consistency when pregnant and not? I've been having a slight discharge of what seems to he cervical mucous. Peeing what seems like every 5 minutes, nausea on and off without vomiting, minor cramps and backache that don't last very long, feel like I can sleep forever and very thirsty and I'm on day 45 of my cycle.(cycle is normally only 32 days) had a BFN yesterday morning. Just curious as to if the cervical mucous discharge is also a sign of pregnancy? I'm not trying to get my hopes up,because we've been thru 3 miscarriages already. I just want my miracle!!