Yes, you can take a low dose during post cycle therapy (pct) but it not crucial because theres not much aromatization going on anyways since your test is really low. If you do, I would continue even a little past post cycle therapy (pct) to help any estrogen rebound like lebonandon said. Clomid and Nolva are SERMS, they prevent most estrogen from binding to receptors, thats why they are crucial during post cycle therapy (pct). adex is an Aromatase inhibitor (AI), it prevents testosterone from turning into estrogen, thats why its important during a cycle.
I feel like you should have known this already though and known what AIs/SERMs actually do to your body before you even thought about finding sources.