Spotting brownish at week 25 from low lying placenta

I was admitted last week for spotting and they discharged me 2 days after it cleared. No bleeding since then. The hospital gave me 2 weeks of HL, but I was advised by my colleague who used to work for an o&g dr that usually such cases dr won't allow them back to work until the placenta has moved up. Any one facing such issue any advice?