Breastfeeding and period?

I’m four months and a week postpartum and I’ve had my period twice but now I’m a week late, I’m pumping twice a day at this point because I’m starting to stop pumping due to personal issues. But I’m worried and VERY anxious over this, there are people who can have babies close together but my husband and I are not ready for another baby ( we’ve been using condoms and when I was done pumping I was going to go on birth control. I’m terrified I might be pregnant again could this just be hormones acting out while pumping or is this me being pregnant?