Gloomy weather, no sun represents depression, combined with the dream behind (mouse and cat ridicule, she invited you not to go), what is your depression or resistance?
The behavior of mice and cats in dreams is anthropomorphic, representing someone. The mouse and the cat were originally antagonistic, but they laughed at you together, so these two people may not have a good relationship at ordinary times, but they agree on one question about you. Replacing someone with a mouse and a cat can also show how much dreamers hate them. And hating them may also be because they force you on a certain issue.
"But I'm not afraid of them" means that you are unmoved and don't accept their opinions.
There are some dream arrangements behind. The girl in the dream represents your wife according to your introduction.
In reality, your birthday became her birthday in the dream. One is the material taken from memory, and the other is the transfer of responsibility. Birthdays have the pressure of growing up, the responsibility that must be borne and the task of planning for the future. You don't want to bear and think about it, but you put it on your wife.
"Through the gate, I saw a group of people rushing past my door to congratulate her on her birthday. I was afraid." Your description is strange, but it can be explained by combining the dream above with the dream below.
"People live" means that there are many people, so in reality there are few people, and you have the pressure to "add people". You are not prepared financially and psychologically for having children, so you have some resistance.
"The helicopter dropped a tube with a sucker at the end, and it would suck me after me." There is a sucker on the tube, which symbolizes the female sex organ and placenta, so the wife's willingness to have children will be stronger than yours.
"Cats and mice looked at me and laughed, and I became more and more afraid." Cats and mice may represent friends, relatives and even your parents. The teasing about having a baby may be well-intentioned, but for you, it is stressful.
The latter has economic problems when it comes to money.
The whole dream is after the birthday, and it is a sort of future life by the subconscious mind. The most important problem to be solved and considered in the future is having children. But you are under psychological and economic pressure, and you have some resistance.