Injection Sayana Press

So I started the injection back in November had a really heavy period beginning of December but I’ve been having pregnancy symptoms for the past couple of weeks? I’ve heard it’s pretty good for protecting against pregnancy but I took a test this morning and it’s a slight faint line but it maybe an evap line not too sure I’ll put it in the details bewlow. If anyone can give me any info if they’ve have got caught pregnant on this or not it would be much appreciated or if it’s normal to have symptoms like this? Thank you!