Aching and worried

So I’m 13 weeks pregnant and my lower back is aching and a little in my stomach I feel like I need to pop my back but it hurts if I try. I’m really worried and haven’t gotten to go to the OBGYN yet. I’ve only been to a clinic because I had to wait for Medicaid to come in. It’s not like a cramping pain but I’m still worried. And advise please and I’m trying not to worry so if it’s normal please tell!😢

Also what should I look out for that isn’t good or not normal. All info is needed❤️ thank you in advance