Counting kicks?

I’m 31 weeks - My baby is usually active for a couple of hours on a morning and then she’s more active between 7pm and 10pm at night.

This morning I’ve barely had any movement at all, no kicks just a few faint flutters. I have noticed that my stomach is a bit more squishy at the front so her back/legs aren’t at the front of my belly.

I have an anterior placenta anyway so I think she might have just moved and I’m struggling to feel it but I don’t know how long I should wait before phoning my Midwife - I’ve been up and out of the house at work since 7am and it’s now 11am so that’s 3 hours?

I went to the monitoring unit about 27 weeks with a similar issue and they picked her up fine and moving on the monitors I just couldn’t feel them because she’d moved.