Re: colic and comfort nursing - ahh!
Does she like being worn? My DD had a bout of fussy/colicy nights and our best bet for a quieter and calmer night was to have her in the Moby on me (not DH, unfortunately). In hindsight, she was showing early signs of mild reflux. I am certainly not diagnosing, but maybe nursing an an angle and keeping her more upright after feeding to allow gravity to help keep things down is worth a shot. That technique I didn't learn until much later, but it is essential for DS now and I am so grateful to not have fussy nights. (even though he has pretty bad reflux and several food sensitivities)
Good luck! And like VeganCupcake says, it will get better.