HELP IM DRIVING MYSELF CRAZY! Little tmi warning

So I’m very new to this whole tracking and checking and charting thing and let me me say my fertile window is 19th-25th, it says on the app.

Ok so I’ve been taking my temp every morning while still in bed at the same time every day but haven’t seen anything except ups and downs. My Cervix is pretty high and soft, it is open a slit, but I’ve also had a child, and I haven’t had any cm on my panties(tmi sorry) but when I check my cervix it looks like a cross between creamy and watery but it’s not a lot. So I’ve felt cramps in one side and a little lower backaches, and my breasts have been a tad achy but not to touch just like sitting there I’ll have an ache, it’s strange.

I’ve been BD with DH just about every day for the past 4 days or so. I have the clearblue advanced opk, because I figured it was pretty foolproof, and I test with first potty and it’s negative! It’s supposed to give me a few days I thought, a couple high maybe and a couple peak, but all I have gotten are lows😩.

I’m worried that I’m not going to ovulate or that I’ll miss it. I’m on CD11 and my cycles are 26-28 days. I know I’m probably worrying for nothing, can u share some experiences please to reassure me? Can I go from low opk, high, soft, creamy/watery, sorta open to high or peak opk, high, soft, ewcm, open and everything else that happens when ur about to ovulate, over night? How long does it usually take to make all those changes? With my symptoms does it sound like I have a ways to go before O?

Please help a struggling newby!😫