Help . Need opinion

Hi ladies, so my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> told me that period was supposed to come on the 11th. Another app I used told me it was supposed to come on Monday the 16th but that app is always off. I typically get my period on the 11th or 12th and it’s gone by the 19th. I tested on Monday the 14th and I’m on Wednesday the 16th. Both test came out negative. I’ve been cramping since September the 7th. And every time I check it’s nothing, sometimes a little white discharge. My doc doesn’t have an appt till mid October and I’m not sure if it’s worth going to a walk in clinic. Is there still a possibility of me being pregnant ? Or no, it would have showed by now on a test. I’ve never been two weeks late and when I was it’s because I’m pregnant only thing is my breast don’t hurt like they did with my other two pregnancies so it has me thinking it might be something else. so I’m stuck. It’s also very awkward that I’m cramping for two weeks and nothing still has yet to come down. I only cramp during ovulation and my period and I already ovulated. What do you think ?