I got that twice before getting my actual period back
I breastfed our LG exclusively for 15 months I got my period back at 8 weeks pp, about 2 weeks after ide stopped bleeding from a vaginal birth. You can still have symptoms and still get pregnant while breastfeeding x
You might actually still be ovulating without a period, that’s why you are still feeling symptoms. Note in your phone what day it is that you feel this way, and see if it comes roughly every 4w. If it does, you are probably ovulating. That’s why some BF mums still get pregnant while BF w no periods- they are still ovulating. Daily body temp can also be a sign, if you really wanna know get some ovulation strips
I used to get “phantom periods” basically all the symptoms without the actual period. They started about 7 months PP for me and continued until I weaned around 13 months and my period returned.