It may be worth getiing checked out by a doc but....
I recently had sciatica 'properly' for the first time and it is really painful, my sympathies.
The pain migrated as I slowly recovered and towards the end of my recovery, the worst pain was on the outside of my calf.
Doing certain things or being in certain positions brought it on. Perhaps you have found a position that brings on your pain either moving to get out of bed or having laid in a position?
The sciatic is a big nerve and I found it painful in various spots from back to feet.
Anyhow, as I say, perhaps best to get it checked if you can.