Weird spotting/discharge

So my period was supposed to start on Jan 31st but I started having pinkish brown discharge on Jan 27th my doctor said it was normal but I never got a period and I’m still having brown discharge currently. My doctor ran a prolactin lab and that came back normal. My periods are usually irregular when it comes to how long my cycle is but I usually always get a period each month. Has this happened to anyone else? (Messages my doctor and she said to just wait to talk about it at my fertility appointment next Thursday)