Hello somerandomgirl,
We have a great support article that was linked to your posting that might help with this. Please take a look at it here: If your Apple Watch isn't connected or paired with your iPhone - Apple Support. Follow this guidance:
"Check your Apple Watch connection
If you don't get notifications, messages, or calls on your Apple Watch, your Apple Watch and iPhone might not be connected. When your devices disconnect, the red iPhone icon or the red X icon appears on your watch face. You can also check your connection in Control Center. When your Apple Watch connects again, the green iPhone icon appears.
First, bring your Apple Watch and paired iPhone close together. If you still see that the devices are disconnected and need help, try the steps below. After each step, see if your devices can connect.
Try to connect your Apple Watch and iPhone again
- Keep your Apple Watch and paired iPhone close together to make sure that they're in range.
- On your iPhone, make sure that Airplane Mode is off and that Wi-Fi and Bluetooth are on. To check, open Control Center.
- If you see the Airplane Mode icon on your watch face, Airplane Mode is on. Open Control Center, then turn off Airplane Mode.
- Restart your Apple Watch and iPhone.
Unpair your devices, then pair them again
If your Apple Watch still can't connect, unpair it from your iPhone, then pair your Apple Watch and iPhone again.
Contact us
If you still need help, contact Apple Support."
We also suggest updating your iPhone to the most recent iOS version:
Update your iPhone or iPad
“1. Back up your device using iCloud or your computer.
2. Plug your device into power and connect to the internet with Wi-Fi.
3. Go to Settings > General, then tap Software Update.
4. If you see more than one software update option available, choose the one that you want to install.
5. Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now."
We hope this helps. Let us know if we can assist with anything else at all. Take care.