What is happening 😵

The other day I decided to look at my glow calendar to see when yo be expecting my period only for it to say 29 days late 😳 so I figured I forgot to write down my period last month. It was expected September 15th and on the 14th I wrote that I had light spotting. We had sex a week or so before the 14th and I didn't write it down 🤦 so I asked my husband if he remembers my period and he looked frightened 😨 as he said I don't think you had one at all. ( He is very good at remembering) so I'm guessing I just forgot to write it down as I was dog sitting that week and I take care of my mom who has dementia and she went to the Dr 3 times that week and I have a 3year old and a 7month old. So I've been kinda waiting to see if it shows around the 15th since my period are pretty regular. I did take the cheap 88cents test and it was negative but that was 4 days ago. And still no show of Aunt Flow. 😖

While we aren't ttc as we usually struggle any way ( both of our babies are rainbow babies before each pregnancy I had 2 miscarriages )

Any advice is appreciated I will be getting a good test today so I will update 😳 thanks