I don’t suffer from pre-eclampsia, however due to my age (41) hence Doctor has recommended that I start taking aspirin when my pregnancy reach 12week. I have been taking it daily since. I’m 26 weeks now. It is relatively safe. In fact in some state in the US, it is recommended to all pregnant to take it when they are pregnant. You can read about it’s benefit and the risk (which in my view benefit our weight risk).
For yourself and baby, do start since you are diagnosed with pre-eclampsia already.
I hope my sharing helps you.
Take care and God bless you and baby.