Should I reach out ?

Hi so yesterday night I went into my dms on Instagram & there was a message request that I haven’t noticed until then so I opened it & it said “ this is blank “ it was my baby’s father who I haven’t spoke to in 4 months, he sent that maybe 8-9 days ago & i send a reply saying just “ hey “ & I still haven’t heard anything back.. he made a whole fake Instagram just to contact me so I’m like maybe he saw me not responding & he got rid of the account.. I don’t know should I reach out to him & see what he wants or just let it play out ? I want to reach out but he’s the one who texted my Instagram so maybe I should wait on him.