Sinus drainage, all clear mucous, post nasal drip in back of throat, clearing throat constantly, just started getting body aches, but no fever?

What's the question? The symptoms sound like a viral respiratory infection ("cold"). Unless you develop a high fever, severe cough, chest pain, or shortness of breath, no antibiotics or specific medicines will help. The best treatments are rest, lots of fluids, a nasal decongestant or antihistamine if you are uncomfortably congested or need to just dry the drip, and a non-prescription pain reliever if needed.