Could i be pregnant?

Patient: Im an 18 year old girl and have the contraceptive implant. Since ive had it put it i havent had a period and its due to be taken out in march this year. I had unprotected sex about two weeks ago and recently been having some symptoms of pregnancy. I just want to know if its even possible for me to get pregnant even though ive been having no periods? is there any chance i could be pregnant?

Symptoms: Lower stomach cramps, more tiredness than usual, tender boobs and always feel like i want to cry