Question about early baby movement

Stephanie • Married 2 years, 4 baby losses. Jun 2017, chemical. Dec 2017, missed miscarriage. Jul 2018, ectopic, lost left tube. Nov 2018, missed miscarriage.

I’m currently 18+3 and for the last few days have been feeling consistent movement. My question is, is it normal to feel bigger movements one day and very subtle movements the next? His kicks were very noticeable yesterday, but so far all day today, they’ve been barely noticeable. I can barely feel it.