Need suggestions

My got my beta Hcg test today and my reading is 215.13, IU/L,

but my gynaecologist says that according to him it should be above 700, and my LMP was on 25th May

And I got my IUi done in first week of June

He ask me to repeat the test on Wednesday

According to him he feels if the count doesn’t double there can be issues later

I am so sad after hearing this

I am so confused , as per the chart online it states I am 4 week pregnant but he was expecting the score to be in range of 700-1000IU/L

Worried 🥹

Prayers 🙏