Implanon and Pregnancy?! 😰

So I got the implanon birth control the first weekend of October and my health care provider told me to wait 2 weeks before having sex, it's been just over two months and me and my boyfriend finally had sex about two weeks ago and he came inside. I've been having dreams about being pregnant just within this last week and it's freaking me out just because I sometimes believe the dreams are signs so should I be worried or is it just me being paranoid because I'm constantly seeing pregnancy posts all over Facebook? because I know my dr said it's very safe and stuff but the birth control keeps your period irregular so how would I know I'm pregnant in the first place? (I never really touched base on that with my dr before I got the implant) 
and for those who are curious about the birth control, I do love it so far! I rarely bleed, I don't ever break out but I'll get a pimple here and there now but other than that it's great!