29w not eating enough

A
I'm 29 weeks 2 days and I feel like I'm not eating enough. I'm not doing it on purpose I'm  just always busy, I waitress and the days I don't work I have a million things going on. I eat before work and I get a break at work and I eat dinner. I just feel like the gaps I have are to big between meals or I don't eat enough in a sitting. I don't know what to do! 😩