Period

Hey I got my implant out last month , 4th December and my last period finished on the 5th December .. according to a few different apps I should have got my period 2 days ago ( which I haven’t ) , but have had unprotected sex within the last 3 weeks.. took a test yesterday which came back negative but have a few pregnancy symptoms , could this just be my body getting ready for my period or because I had my implant removed ? Or am I in the early stages of pregnancy hence why tests are saying negative ? TIA :) xx