4yr old constipated

😪😭😓pleasee someone who's gone thur this help we are miserable right now. Its going on day 4 no poop he used to poop daily or every other day... hes in pain it won't come out I hate seeing him in pain 😢... I gave him pedi max laxative medicine its not helping what should I dooo??? He cries screams in pain

UPDATE: THANK YOU EVERYONE last night was miserable all my kids are sick and my oldest whos only 4 also was constipated he kept saying momma I just want to sleep my tummy won't stop hurting omg I 😢 felt like a bad mom...i was up with him all night he did sleep a bit in my arms.. but guess whatt!!!!! About an hour ago he pushed and got it out!! We did to mira lax in water i think that's what helped him. Thanks!!! For being there to hear me out and giving me advice everyone.. it means alot I dont have friends or anyone to share.