23 days late no period and multiple negatives

Hello to whoever is reading, so I'm just gonna be very straightforward with this. Here's a photo of my cycle that I missed

As you can see I did have sex on the 30 which was my ovulation day on my flo account but I honestly didn't know I was until I checked the date, I also believe stress levels were high around that time a little bit after... now on to the "symptoms" here's a list ⬇️

1. Headaches

2. Backaches

3. Cramping on my right side only/sometimes both sides

4. Feeling really nauseous (atm), ( tight squeeze feeling with a mix of something keeps trying to come up but isn't) feels like throw up

5. Feel tired than usual

6. Missed one month/half period

7. I ate a bowl of cereal yesterday feeling fine, got to half the bowl and I was already feeling worse (nausea)

8. Diarrhea 2xs (I do not have a regular digestive system so I know if its anything I did eat im not just the person to shit it out tomorrow or the next day) its irregular

These are the "symptoms" I've been feeling here's a backstory about me, at 19 I was pregnant with my twin daughters and I did have a c-section now I don't know if this has anything to do with why I'm so late. I will be seeing a doctor tomorrow to have some accurate information. I just want to see some opinions from you ladies or moms that maybe experienced it or know someone that did. Let me know down below thxs for reading!!