Totally normal. The unlimited lettuce did not satisfy me, and I haven't found the packets to be something I wanted more of either - especially the mix that first week. I drank hot tea in the evening, had a couple slices of lean ham or turkey, and went to bed early! It does get better.
W1 -7.8 W2 -2.6 W3 -3.6 W4 -2.2 W5 -2.2 W6 -4.0 W7 -1.8