a subconjunctival hemorrhage is not really related to retinopathy, just for your piece of mind.
it is VERY common for them to last 6 weeks. 2 months even is no big deal. many, many people get these for no reason, or when they have a coughing or sneezing fit, or lift something heavy, etc. it is not dangerous at all, nor is there any way to fix it or treat it. it will go away on its own but may take many more weeks.
one isolated subconjunctival hemorrhage event does not mean anything. it will only be significant if she keeps having them over & over (then it would likely mean she had uncontrolled hypertention or some vascular disease)