caffeine while pregnant??

hi ladies! to start off, i haven’t confirmed a pregnancy yet. i’ve been on nexplanon for a couple months now because i just had a baby over the summer. anyways, i’ve started having the same symptoms i had when i got pregnant with my baby (nausea, heightened sense of smell, etc.) and my concern is that i have been consuming a LOT of caffeine lately. i’m planning on testing asap, but i’m just wondering, could all my caffeine consumption potentially harm a developing fetus?