Lisa, the supply should pick up again. Some mums do find that they have trouble getting milk out a breast after a blockage but it seems to be a temporary thing. You are doing all the right things already, but you could also try some gentle breast compression while you express, and swapping breasts after each let down. Sometimes this can really help. While you are still not getting much from that breast, trying to express again about 20 - 40 minutes after the first go could help too if you are able to find the time. You are doing a really amazing job hun, exclusive expressing is really hard work and I truly admire you. I hope that things are back to normal quickly for you.