If it is "LIKE" day 73 after the switch... then you have been in bud for about 62-65 days, your plant takes about a week to 12 days to convert to bud from veg, after you throw switch... [growing outside, you count the bud days when you first see buds, so subtract 7-12 days] so your plants look deprived at 7 weeks....I'd say maybe another 3-4 weeks...Leaves drooping, too much water? or too little ..... So, some plants take upwards of 10-12 weeks in bud...
Good Luck!