Want to loose 15 pounds!!!!!

Hi everyone!I am new to this forum.I came through the forum googling:)
I feel terrible as I have gained 11 pounds in a month and half:((
I was on vacation and screwed up my diet!
I was good for the first week but then I just did not watch and control my eating....pastries,rice,bread,noodles🙄
My clothes are tight already and needless to say I feel terrible!
Please give me some genuine advice on how/what to do to loose 15 pounds......I am
Willing to work hard for it!
I just don't feel good at all:(
I am a 43 years old,5ft3 inches female.
Thanks....