Three days late and negotiable results

Cassandra
Hi I'm 3 days late and have been having sore back, bloating, tingling breasts, mood swings, light cramping, and nausea. I have been tracking cm and cervix position and I thought that I ether ovulated two times this cycle or really late my period was due 20-21 May and on the 16 I noticed my cervix was very high soft and open now it has dropped a little and is firmer but not hard like normal and I have creamy cm I did do a test on the Saturday but in the arvo as I had to buy some and it was negative I don't want to try again to soon incase it's a negative again 😫 but I'm not normal late should I wait till next weekend and try again or could I try before then 😊