My typical disclaimer is that I don't know anything so if anyone says anything different then, go with them before me, but here's my thoughts on it even though I know nothing.
obviously you had a queen not to long ago, and that would be after april because you have larva. your queen could of left certainly, or, because you are not experienced you just may not be good at spotting your queen.(is she marked btw?) queens typically should be replaced super quick I believe if something happens to them, but if the larva/laying pattern is spotty, that does mean trouble, and it could even mean it isn't a queen laying the eggs, the bees will I believe in certain situations actually lay eggs themselves....and they do it in spotty ways....the queen sort of keeps order in the hive. My suggestion, from someone who knows totally nothing keep in mind, would be to look more carefully first off. A lot of time newer beeks like myself have the impulse to rush, but we really do not have to, so much, I do not think. get back in there and really seek to understand what is going on. what size TBH do you have, how many bars, and how deep/etc. was the brood capped on the first cells, and were there drone cells, or was it worker cells? bees typically place honey stores at the top of drawn out comb. you should know the difference between capped honey cells and capped brood cells. a healthy laying pattern will have a medium brown cap, and there will be periodic cells with uncapped larva,eggs or necter in them even. after being layed, between 5-6 daysish, the cells are capped. they then go into a prepupal stage where they spin a cocoon/etc.