What you're describing, feeling more emotional, overthinking and needing extra support right before your period, is a real pattern called PMS. Falling estrogen and progesterone in those days affect serotonin, the brain chemical that keeps mood steady, so this isn't just you being difficult.
Next Steps
Note your mood alongside your cycle dates for two to three months to see the pattern clearly. Good sleep, regular exercise and cutting back caffeine and salty food in that last week often ease it.
Health Tips
If it's strong enough to strain your relationships every cycle, that's closer to PMDD, a more severe version that responds well to treatment. Please consult your gynaecologist about it.