delayed period

hi mums i just wanna ask kung meron same case ko dito, its been 6 months when i gave birth via CS and nagstart ako magkaperiod nung jan. and feb meron na rin but this march hanggang ngayon wala pa rin and im also exclusively breastfeeding my baby, im afraid i might be pregnant again pero i kinda feel na hindi naman kasi the last few weeks was stressful for me kaya im thinking baka delayed lang talaga, actually 6 days na, baka lang meron dito na nakaexperience na madelay kahit naregular na yung period or i should start worrying na coz baby number 2 is on its way