scared. need opinions please

Alison • 33 married.ttc.1babyboy. 2mc 1 ectopic w/tube removed

So I had blood drawn the other day and my beta hcg was 141. today was 275. she said they want it at at least 250. So I hit the mark. she didnt seem worried but I still feel it should be higher. vag ultrasound scheduled for 31st. I'm scared 😣 should I be worried?