3rd pregnancy, 1st time I spent every waking minute worried.

Found a heartbeat via ultrasound at 7 weeks.

Had another ultrasound at 11 weeks, heart beat and saw baby move.

Had a checkup at 14 weeks, doctor couldn’t find a heart beat right away (It felt like 15 minutes but I’m sure was was maybe 15 seconds) but found one (120) and was happy.

I’m now 17 weeks, and I have no reason to think something’s wrong but I cannot shake the feeling every 10 minutes that something’s wrong. I think I’m feeling flutters but than is it gas? My stomach is very hard down below, when I press down & even at the top when I stand up.

Is this normal to be so worried? Any tips or tricks to calm down?