Could I be pregnant ?

Rebecca

Hey! Had my implant removed 4th December and had unprotected sex during the time I was due to ovulate. My last period finished 5th December and I have took a few tests which have said negative and I had one that said positive then the second line disappeared. My period was due 1st January! Around 3 weeks ago I had a light bit of spotting and again just now I’ve had some spotting but very light coloured so I know it’s not my period coming. I’ve had near enough every symptom of early pregnancy but negative test results , could this just be my hormones because of my implant being removed or could I be pregnant ?