Surely not pregnant?

Eve

So I have been having very regular sex with my boyfriend this month and we always use condoms from start to finish.

The last few months I have been having a 3-4week cycle. BUT this month I am 5 days late for my period if it was a regular 4 weeks cycle. This is seeming very odd to me.

I got the Implanon put it in my arm the day my period was due and they pregnancy tested me there and it was negative. But my period still hasn’t come!

I have all my usual symptoms: swollen sore breasts, acne, and some mild cramping BUT NOTHING.

could I be pregnant? Could the implanon stop it from coming even if I felt PMS symptoms and it was due on the day I got it in?

Thank you xx