Worried I have undone all progress in two weeks

(29f) I am spiralling and it’s crazy because I know how this works but for some reason my mind is not thinking logically at all.

I have consistently been on track for 4-5 months and I’ve lost 21lbs plus around 8% body fat. For the past two weeks I have fallen off track and will fully hold my hands up and say I have eaten a lot. I had a bad hormonal month and think my body was fighting back after being in a long deficit. I also just really wanted to eat some damn chocolate. I have still worked out around 4 x a week but my usual effort has been far from there.

I have gained 6-8lbs on the scales and I look and feel huge. I can no longer see clear muscle definition and feel like I’ve undone my progress. I am convincing myself this is all fat gain and not just a reaction from hormones and water weight.

Please can someone talk me down from the ledge? I go away on holiday next week and I am going to try and get rid of as much excess water as possible, but I still feel like I have ruined anything.

What are the chances I have gained the fat back and the water weight will not come off? Is there anything I can do de-puff in 4 days?

Thank you so much.