pregnant??

so my partner and I did the deed, but it wasn't on exactly the 14th day but more the 11th. the cervical mucus was rather hectic. My question is would be too early to do a pregnancy test and also how accurate would it be now? I feel like I have all the symptoms (nauseous, yeast infection, moody, can't stand the sight of some food) however that said I am also sick so it could be the reason I feel crappy.