Still so anxious even after seeing the heart beat

We had a loss at 9 weeks in June, baby never progressed past 6 weeks and I had to have a d&c in July. We have two living children that took us years to have because PCOS. We got pregnant again in December and I don’t really have any symptoms, same as my last pregnancy in June. With both my girls I had horrible morning sickness all day everyday. We got to see baby on Monday and thank god there was a heartbeat this time. Even tho I saw it, I can’t help but feel so anxious and I keep telling myself don’t get too attached cause anything can happen. This feeling is so awful and I never felt this way with both of my first kids. I just hope everything works out, my girls have been asking us for another sibling and I can’t wait to tell them.