I'm having some sinus issues related to seasonal allergies. I have a RX for amoxicillin that I had filled a while back but didn't take. Is it ok to start taking it now because I have sinus headaches/pressure, throat hurts & stuffy nose. I'll also use saline rinses to keep my sinuses cleared out as best as I can so that maybe it won't get too bad. I just really can't afford to pay to reschedule the surgery date due to being sick. Thank you in advance for any answers and/or advice.