Should I try to plan a baby with following medical history: rt cva 2000 (age 22-av malformation and htn) partial thyroidect 2003?

Depends. Your complex medical history makes a pregnancy high risk but not necessarily impossible. The HTN is easiest, make sure you control your bp. Thyroid disease requires close monitoring as well, presumably it was benign. The avm is most difficult/unknown if it not corrected. You need to see a high risk OB with a neruologist and/or neurosurgeon.
Yes. Make sure u are under supervision of a neurologist, neurosurgeon. Bleeding from avm need to be considered during pregnancy or delivery.