2yo DS has had a heavy cold for a week, the tail end of which seems to be a persistent cough. He's fine during the day but at night coughs constantly as he is lying down. As we cosleep this means no sleep for either of us, and after 3 days I desperately need something to try and improve his cough! I've given him some bog standard tickly cough medicine from the supermarket, but it doesn't seem to be doing much. I'm not even sure which way round it's best for him to sleep! He's mostly on his front. Does anyone have any advice? TIA