help me!

Harriet • Fine art student studying in Holland. A lover of life, minimalism and happiness.
My period has never been regular but it is about 2 weeks late. I haven't had sex with anyone and am worried if anyone knows what it could be? I had my implant taken out in December and had a period pretty much 3 weeks after that was taken out. 
If anyone could enlighten me that would be much appreciated!