@coolsista-paris hugs to you. Breakage is frustrating. Don't worry about length deadlines. That can be extended. It's better to focus on a remedy for the breakage. I remember you asking about a clarifying shampoo. What did you find? What's in the serum that you use? Some products give a false sense of moisturization when they just coat the hair.
@Cattypus1 and
@long.hair.dont.care made great suggestions for helping moisturize and seal. Keep notes on what you try and what were the results. Sometimes we change up so fast, we're not giving a product or technique a chance to work.
Do you use LOC or LCO? This is nothing but product layering. Whatever method you use to seal, notate it. Try to find a style where your hair is out of the way and you're not touching it. When you get home, assess how your hair feels. If it's dry, moisturize and baggy but don't drench your hair. Check and see how it feels. Then seal your hair. I use oil on my hair and if I'm going running I'll use a butter on my ends,too. I use a manufactured product from Carol's Daughter. Check your moisturizer and verify it doesn't contain glycerin. I can tolerate this ingredient all year round but some people can't. Water with your favorite essential oil is good enough. Water, your choice of oil, and a cream moisturizer works for me. My cream moisturizer isn't anything expensive. Most of the time, it's something I want to get rid of and doesn't dry my hair out.
Please, relax and don't let deadlines or hair goals stress you out. This will pass and you'll be more knowledgeable as a result of the experience.
What kind of shears do you have?