Please help!!!

So I’ve been off of my birth control since September 2016. My husband and I have been only using condoms but every once in a while we will do without. I did just start a new job too where I’m with a whole bunch of women. I went to the bathroom tonight and noticed a little bit of blood but I’m not supposed to start my period for another week, this doesn’t look like a period either. I’m hoping it’s just my cycle changing due to the new job. What do you think??