Could I be pregnant?

Karen
I had the IUD for a while now but I had some problems with it, the strings were really hurting my SO to the point where he would bleed OUCH 😖 sorry TMI, so I got the IUD 
Removed and we planned on getting the implant, ok obviously before removing the IUD he was ejaculating inside me all the time, and the day it was removed , he had came inside me the night before and I know how sperm and live up to a few days in the body, but we thought our chances were low. Ok so long story short meanwhile we've been using condoms, but he usually he goes in without one until he feels he might ejaculate so he puts one on, he hasn't came inside me , but I know such thing as Precum, again chances are minimal. I have a feeling that I'm pregnant , I have some early signs, like soar breast, headaches , and I feel nausea , I took a test 5 days before my missed period, NEGATIVE...I took another test 2 days after my missed period, again NEGATIVE... And I am now 6 days late I have one last test left and I don't know if I should take another or not