Ive been ebf for 7 weeks now. Recently my right breast keeps really filling up and getting very hard between feeds and I keep getting a hard lump by my armpit which goes once I feed. I'm also leaking a lot!! I'm demand feeding (at least every 3 hours during the day though sometimes 6 hours at night). I'm also expressing once per day during the day (around 3oz). Should I be getting up in the night to express as well? Any advice?