Pregnancy

Hi ladies.. A friend of mine menses delayed and she suspects pregnant. She has done UPT test several times and it shows -ve result only it seems. She's going thru drowsiness and some nausea symptoms past few days. According to her, monthly cycle is about 21-23 days everytime and it's now day 32 no any signs of menses. Since 1st pregnancy so she's abit unsure of the situation. Any possibilities of her pregnant or it's just menses delayed.