I get sinus pain, shooting left ear pain + tooth pain on the left side lower molar+ canker sores on my lip. How are lip sores related to sinus pain?

Unrelated problems. 1. A sinus infection or inflammation can cause a ear pain, These problems should be managed by your PCP or ENT. 2. Toothache -see a dentist 3. Mouth sores (aphthous ulcers) are painful sores inside the mouth. The sore may be painful for three or four days, but complete healing usually takes ten to fifteen days. Canker sores may recur many times each year. No cure is available.
Unrelated. Unrelated See DDS for toothache. MD for other symptoms.
They're not. But you need to see a Dentist to evaluate the causes of your many symptoms. You may have infections that require Rx.