Period? Still waiting...

Philesha Alise • Momma of 3!
My LO is 4 months (18weeks) and he was EBF up until 3 weeks ago. I went back to work and have been supplementing with formula for 2 feeds/day. We still breastfeed about 4 times daily. My question is: should I be expecting my period soon? I've had a few cramps maybe a week ago, but still no period. I'm debating taking a pregnancy test 😳... Anyone else still waiting for their period?