Need help please!

I am currently 5 days late. I've taken 4 tests and they are all negative. I have had no spotting whatsoever, and a lot of discharge, and this morning the discharge was slightly brownish. I have had mild cramping for a few days but nothin like period cramps. Also, my breasts are very tender.  Me and my husband have been TTC for 2 months, so I am kind of new to all this! So, please help! I'm wanting to know if anyone has experienced these symptoms and what the outcome was. Please and thank you! :)