Sensation of blood flow throughout my whole body. Dizziness, nausea. Sinus, pressure in my head, leg cramps on both legs, neck pain with muscle spasm, stuffy nose, different warmness leg feeling.?

Don't know. There is no way a forum like this can sort this out. Talk to your gp. He/she will take a full history, do an exam, order appropriate tests and refer you to a specialist if needed.
A Viral infection. You probabely have a viral infection causing these symptoms , but you should consult your doctor to confirm it.You can take tylenol (acetaminophen) or ibuorofen for aches and pains till you see your doctor.

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Right Index finger and right eye lid twitching. Leg cramps, neck pain, headache on temples. Vertigo.

Sounds systemic. There are too many problems to be isolated to 1 specific part of the body. I am not sure of what medications you are taking or what other medical conditions you have, but given your age I suspect that you have an electrolyte imbalance that is causing this cascade of problems. It could point to something serious. Get to an urgent care center or ER to get your electrolytes checked & other tests. GL! Read more...