re experiencing pregnancy symptoms ??

i know this is weird but i’m almost 4 months pp and i’m starting to experience my pregnancy symptoms again ? like i crave the same things when i was pregnant, food aversions are back, a little nauseous, and i got light headed when i stood up. last time i had sex was the 8th and before that it was almost a month. i took a test (even though i know it hasn’t even been a week) and it’s negative.

is it normal to start re experiencing your pregnancy symptoms postpartum ?

we use natural family planning because i can’t be on hormonal birth control

edit: also mild cramping