Does anyone else have this problem

I'm 20 weeks, sometimes I feel like I forget to eat as much as I should, I never really used to eat a lot, not that I was starving myself or anything at all, I feel like I "pick" more through out the day, a couple grapes n strawberry a here, crackers there, besides lunch and dinner, I try and eat healthy just sometimes I notice I haven't ate in hours and even though I'm not hungry I make myself eat. I take my prenatals, and drink a lot of milk and water, I hope I'm ok