I'm sorry you've been facing some worrying bumps during this pregnancy. It's really reassuring that all your other symptoms are absent- blood pressure is good all your labs are stable. Flashing lights are one of those challenging symptoms that happen for so many normal reasons. That being said, totally not doc me, says I would still report it to your doctor at your appointment and continue to keep all the other symptoms monitored.
Pregnancy after pre-e can be really stressful. Be sure to set up a good support network and discuss your concerns with your doctor so that you can create a monitoring plan that helps you feel as safe and watched over as possible.
Keep posted as you're able.
2008-Our Baby Girl, PTL born too early at 30w6d, Fought so hard... Forever Loved & Missed
2010- Lil' Bro, Pre-E at 29 weeks... Induced at 36w6d, Born 37w
2012- Lil' Sis, Super-imposed pre-e at 25 weeks, PTL & GD at 35 weeks, Evicted 36w