Can a wisdom tooth coming in sideways not yet broke thru gums cause ear, jaw, neck pain/swelling? What's best for swelling? Plan 2 call dentist asap

All of the above. An impacted wisdom tooth can cause all of the above symptoms, so yes see a dentist asap for examination , evaluation and treatment options.
Yes. Yes, especially if it is just under the tissues. There is probably a communication with the oral cavity. Sounds infected. Otc pain meds, saline rinse. See oral surgeon asap.
Yes. If the molar and surrounding area is infected, an antibiotic should be considered after taking to your dentist. Generally a NSAID like motirin, advil (ibuprofen) or aleve (naproxen) (naprosyn) works better than an opiate. They will increase bleeding somewhat more than a newer NSAID like Celebrex (celecoxib) which doesn't thin the blood. Check with your dentist.Dental extractions don't have to be that painful.