Need suggestions please


So I’m 32 weeks pregnant and I’m really constipated sorry for tmi I’m lucky if I can go once a week it’s now really painfull I’m really sluggish and slow and have no energy I’ve tried drinking only water I walk everyday twice a day as I have dogs I’ve tried fruit and veg I’ve been taking lactelose regular as instructed by my dr but nothing any other suggestions please as I’m now at a loss of what else to do