Pregnancy symptoms? help!!!

Jenna • 22, SAHM to our 2 year old daughter, and married to her daddy. Expecting #2 January 2020. 💛
I've been having some symptoms that aren't something I usually have before a period, which I haven't had yet. My belly has felt very tight, my boobs are really sore if I don't wear a bra, I've been exhausted, slight nausea,and have had a bunch of discharge. 
What do you all think?