I am in early pregnancy and having lots back pain side pain as well belly pain

Hi, i am in early pregnancy and having lots back pain side pain as well belly pain. Visited to the doctor today and she say it too early for ultra sound however she prescribed Multi-Vitamin

Folic acid (already taking)

Phloroglucinol tablet ( Specifically I want to know it is safe to intake)

And oxethazaine with aluminium hydroxide magnesium hydroxide

Kindly advise is it safe to take these medicines in this early stage of pregnancy (5 week started)

This is my first pregnancy and I am 36y old and got married three months back.