red raspberry leaf tea

Hi everyone.... I am in my 8th month of pregnancy and have started taking red raspberry leaf tea as I have heard it help your body in preparation for childbirth... I have been drinking it with honey...and one cup a day.... I just want to ask one thing.... can I add lemon in it...??? I mean is it OK to add lemons and also does any one know for sure how many cups should I be taking as I said am taking only one per day....