Too many scans

I've had a couple losses and I'm currently 13 weeks pregnant. So far, I've had 4 scans and they've scheduled an NT scan for tomorrow. My last scan was just 5 days ago... I didn't know they'd want another one so soon, and they can't push it back because I'm too close to the cutoff. I feel like I'm getting too many scans and the articles I've been reading are worrying me. I think I'm going to cancel the NT scan. The last tech also took her sweet time in there, like half an hour.. my husband could see the screen and told me she was just poking around "looking at walls or something" only saw the baby for a minute. I wish she'd just check on growth and heartbeat then gtfo!