i have this spd thing and its not pleasant at all.. the clicking is probably your pelvis moving position to get ready for birth but i get it too they say the muscle get very relaxed and dont support your hips etc as well due to all the hormones softening the muscles... i have to wear the strap and the band so i know exactly how u feel..
have u tried doing some really careful exercises??? it could probably reduce the friction on your pelvis a little...