Pain during sex!! And ttc

Minie
Hey ladies ive been doagnosed with endometriosis and pcos n i have painful sex the only posisition it doesnt hurt is the missionary posisition but i feel my partner is going to get bored as its always the same and ive also lost alot of desire for it i kno its tmi but i just dont kno what else to do as we have been trying for our rainbow baby since November 2012 its pretty hard with endometriosis pcos and also the pain during sex any suggestions x