Paranoid and worried for baby

I'm currently in my 15 week and turning 4 months next week and lately I've been feeling paranoid and worried about my baby. Like the growth how is the baby doing etc. It's been 2 weeks since my last appointment and i only managed to see my baby for only a few secs as the doc was kinda in rush which idk why😭 (I'm a subsidies pt under KKH) From the first appointment till my last i haven't had a chance to hear my baby heartbeat (anyone experience this before?) but the doctor told me my baby is ok and that everything is fine. So far I've done 2 appointment throughout my 4 months of pregnancy and i won't be having any appointment in my 4th month. My next appointment would be in 5 weeks time so i need to wait a total of 7 weeks to see my baby 😭 How do i get rid of this feeling? I tried to be positive and told myself everything would be fine. But I'm just worried. As my bump still look the same, still bloated, my body still look the same as before i was pregnant. No major changes for now but I know everyone is different and they say that if you're first time pregnant it took quite awhile for bump to show up. Throughout my journey, i haven't been experiencing any morning sickness. I mean i do have some but it wasn't that bad. only a few secs of nausea a day and prob once or twice a week. (which im thankful for) Sometimes i forget that i am pregnant 😔 I hope some mummies will be able to share their stories ❤️ #1stimemom #firstbaby #pregnancy #advicepls #pleasehelp