Hi, I'm On Nexplanon. I've Had It For Two And

Hi, I'm on nexplanon. I've had it for two and a half years. In 6 months I need to renew it. I'm nervous I'm pregnant. I had unprotected sex about a month ago. I haven't had a period since I got on the birth control. But, I was spotting for a day or two. I'm peeing like crazy. Not to mention tired all day for the past two weeks. Is there a chance I could be pregnant?