faint line ...but I have the implant in

Had the implant in back in October after multiple miscarriages so we gave up trying for a while , last day or so I've been feeling sick n no appitite and exhausted , feel so drained,  so it got me
Thinking ... I also spotted a few days ago brown blood .. while being on the implant my periods stopped completely so spotting was strange for me , so today I took a test to put my mind as ease and got these thin faint blue lines ..... really don't kno what to think . Could I have got pregnant on the implant ???