He useless. And I'm struggling.

We have a 4 week old daughter and I think shes been struggling with colic. I've done a lot of research around it and the signs basically point to that being the problem. Anyway I've been doing everything it suggested to help her starting with her feeding position, not shaking the formula swirling it I stead to reduce the air whuch didn't really make much difference, then I bought colic drops which helps a bit and now I've bought the colic version of the bottles I was using. The problem now is that the test is vari-flow and the same flow test in her old bottles is wider but this one is narrower and she seems tos be struggling to drink it as fast as she wants and is showing signs the test isn't the right one for her. Shes only had 3 feeds from these bottles so far the first was awful as it was new so I expected that the second was fine but she fell asleep before finishing and the third was temperamental and she also fell asleep before finishing. She was finishing full 5oz bottles when she had her old ones. Now do I change the teats to fast flow and try that to see if she can drink better as the flow is faster/smoother for her or do I just go back to her old bottles that I know she can drink out of but are causing her problems due to too much air intake. But I also dont want to cause too much confusion that it creates more feeding problems. One of the signs of colic is inconsolable crying late afternoon-evening. From 5pm until around 9:30pm she will have bouts of inconsolable crying and nothing soothes her. She will literally cry practically the whole time and I have another daughter who's only 19 months so it's hard to deal with and sometimes I just have to let her cry for 5 mins whilst I sort her out. Its really hard and I feel like such a terrible mum that I dont know what to do for her and I'm trying everything I can think of and no one understands and no one is helping me. My fiance will literally sit there on his phone whilst I'm pacing the room trying to console our daughter and he literally does not one thing to help me or to take her off me so he can try. He doesnt do one feed ever, change one nappy. And it's all on me to help her and if these teats dont work I dont know if there is much more I can do. My mum says she will get over it in a couple of weeks but I'm not too sure about that.

Have any of you had a colic baby?