OK, day 1 after spraying with nettle juice tea...
So far so good! Most of aphids are gone. I don't know if i killed them or they just left. Found a couple ones and i just crushed them. The terrible smell of the juice tea almost gone, too. Plants looks pretty much the same. No signs of burning or shocking.
I'll check again tomorrow and i'll post here the results.
Extra Good news : I found some ladybugs on my other plants. Hope they stay.