Suggest Treatment For Nausea And Dizziness Along With Sinusitis

Had bad head cold for 3 days with sinus pains. In shower this morning became nauseous, trembling, felt as though i was going to faint, heavy arms, had to get out of shower & lie down to recover. Still feeling a bit spaced out & light headed.Have been taking sudafed for sinus pain. I am not an ill person. Female aged 48. Hf 5f3, wt 64kg.