Hi, I am going in 7 weeks pregnant, and I have had a bit of a cold and a headache for a few days, today there is greenish mucus from my sinuses, I would prefer not to go on anti biotics as I was on anti biotics twice, once before I fell pregnant and then during. Is it safe to let me body just naturallyfight what I off. I don't feel feverish or sick. Just sinus congestion, headache has now subsided.