Not big but huge

I didn't notice that i ate too much during my vacation.Drinking too much softdrinks and eating so much sweet foods are the worst thing i did.Now i weight myself,I was completely surprise that i gain 5 kilos grr!Not big but huge problem for me.I need to start again to take weight loss pills and i need to diet.As what my husband told me that i should becareful because gaining weight is easy to do but lossing weight is so difficult not unless i have discipline of myself.