11 weeks pp!

i know i just have to wait and see, but i wanted others thoughts.

so, i’m 11 weeks postpartum. not on birth control. stopped breastfeeding 6 weeks ago. still no period.

last weekend my fiancé and i had unprotected sex and he did not pull out. 7 days later i had light pink spotting when i wiped, and nothing else since. i’ve had some mild cramping. is that too soon for implantation bleeding? when should i test? since i haven’t had a period i have no idea if/when i ovulated or when i’d miss my period. we wanted our babes close together, but irish twins sound wild 😂 opinions?