Less movement?!

Hey, I’m just looking for some advice as I’m a very paranoid pregnant! I am 15 weeks 3days with my 2nd baby and have really been very lucky to feel movement as early as 14 weeks. My baby was very active around 2 days ago and I even managed to catch a kick on video…. Well 2 days later and I haven’t felt anything for these 2 days. Just pressure and uncomfortable pain in my lower uterus, I think the baby is moving… but I’m not feeling kicks, just pressure in different parts of my stomach where I think the baby has moved too (I hope that makes sense!) should I be worried at all?? I can’t help but panic! Thank you in advance x