This morning I was half asleep because I was drinking with my friends until midnight. When I was brushing my teeth, I felt something weird and found out that I was using face wash instead of toothpaste. That's why my mouth was filled with bubbles.
あえて分かりやすい英語ではなく、冗長なだらだら日本語をそのまま英語にしてみました。 This morning, actually, I was drinking with my friend until midnight last night, so I didn't have enough sleep, so I was brushing my teeth sleepily, and then, I realized something weird. I thought what? and I realized that I didn't gave my toothbrush toothpaste, I gave it facewash. So, my mouth was so bubbly.