Could this be the baby reacting? 18w5d

So I haven’t really quite been able to tell if I’ve been able to feel baby, every now and then I do get these different sensation’s in my belly which I do think are the baby moving around and of course as early as it is you’re not always going to feel it. So it’s happened twice now the past 2-3 days where I’ll put my hand on my lower belly and I’d after feeling a thump like you can really feel it and it doesn’t happen every single time, almost feel’s like when baby wand’s too 😂 do you think this is the baby too?