I did the protocol from 9/04 to 8/05 using Yasmin and had great results. This time around, I did (1) pack of Yasmin and then switched to Necon 1/35. I would like to switch back to Yasmin b/c I would like to see if I get any further breast changes on it (none so far with the Necon...although it has been pointed out that I am BF'ing and this could be the reason). Is there any harm in switching BCPs? Is there anything else I should know about it? Thanks!