Cough during pregnancy

I visited pd and they gave me the usual med that's safe for pregnant women. However I was advised to only take it when necessary. So I tried to let it heal on its own by resorting to eat/ drink natural foods like fruits, honey lemon, those honey candies etc. I only took the cough syrup doctor gave for like 2 times? And those times is when I really really need it. When i cannot tahan one. Haha. It took me quite a while to recover.