Daughter with pain before poop, multiple

Hello, my daughter is 5 and has had r child cough wheezhing etc on and off for the jar 3 months.we gave her antibiotics for 2 months 1 dosage each month We are now giving her levolin and budecort. She's much better now. She still has phlegm though. That doesn't seem to be coming out. Any advice. Last 2 days she poops after eating, says pain before pooping and during. She's lactose intolerant so we don't give her dairy in any form. She used to have reg stomach pains. But now that's stopped. It's only last 2 days again. She poops twice or thrice. Poops not loose but she says pain before poop and also pain in the night. Docs advice is to take econorm twice. Can I give her one at 330pm and then the next at 10 today so I can start both today or is it too early. How many hours gap do we need before the 2 doses. Please let me know. Thank you