Good day! Please tell me when, who started using protection? Straight …

Good day! Please tell me when, who started using protection? Straight away? Or was there sex for some time without protection? We've been exclusively breastfeeding for 1.5 months. The following conditions are met: ( frequent feeding of the baby: the interval between feedings should not be more than four hours; 1-2 night feedings are mandatory; periods are absent: ovulation occurs after childbirth and with the first menstruation, respectively, there is a risk of pregnancy; baby under six months: breast milk can protect against pregnancy only in the first six months of breastfeeding; after that time, the probability of ovulation increases.)