BBT Help..

I’ve been charting my bbt and according to Glow, I was supposed to ovulate around the 8th of January and AF was supposed to start today or tomorrow. After I put in my bbt for for Jan 18, suddenly I noticed that my fertile window changed on Glow to where I was supposed to have ovulated on Jan 15. I had the EWCM (I think) some time around the 6th or 7th, and I even had tender breast like I was getting ready for AF, which has gone away. My bbt has kindof been all over the place. Now Glow is saying I won’t start AF until the 30th, which would be a 40 day cycle, mine is usually 29-30. If I ovulated when I thought I did then I would be 13 DPO. I took a test this morning but the first one I didn’t do right (because I got them from work and didn’t have directions for this particular test), and there was a faint line, but the 2nd test (I did correctly) and the line was even more faint. Somebody calm my nerves...