BF and periods

So I am five months PP and still breastfeeding my son as much as possible. He gets at least 1-2 bottles of formula a day and we have tried a few tastes of fruits and veggies like one a week from the go ahead from our pedi at 4 months. I got what I thought was my period in March on the 15th exactly two months PP and in April also on the 15th exactly four months PP.

Now here it is 6/17 and I’ve got nothing. No spotting, cramps, or anything period related except some bloating. Is it normal for periods to come and go while still nursing????

I am only slightly freaking out as we had some drunk sex on Memorial Day and my hubby and I got caught up in the moment and forgot a condom 🤦🏼‍♀️ according to Glow I would’ve ovulated within the next 48 hours after our sexy time. 😱 we talked about it and if we happened to get pregnant again, it was fine (still is). However I took a test Friday and Saturday and they are blazingly negative yet I still have no period......????????