Pressure and dull pain

Ta

I am 15weeks and 3 days. I’m pretty slender, tall, and this is my first so doctor said I probably won’t show for a while however, I have been getting some pressure or slight pain towards the right side of my belly in both belly and my lower back. It only lasts like a couple seconds and then goes away. Anyone else experiencing this? I checked baby and still have strong heartbeat so we are good there. Thoughts? Insight?