Anybody else's doctor doing this ? 🤔

So I had a doctors recently . And they told me I can't get anymore ultrasounds anymore . So far I've only got two done . Since I've been pregnant I've seen three doctors ( all at the same hospital ) and they all keep telling me different things . For moms who already have kids , how many ultrasounds did you get while you were pregnant ? I feel like what they're saying doesn't sound fair......