Negative test ? Still no af

Hi ladies, so my glow app 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 on Wednesday the 16th. Both test came out negative. I’ve been cramping since September the 7th. I just took a test midday today (September 20th) still negative. And every time I check myself, 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. if I was it would have showed by now on a test right? I’ve never been two weeks late and when I was it was because I was pregnant. However, I received a bfp within 4 days and my breast were sore. so it has me thinking it might be something else, but what. 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 ?