I'm assuming by "your first bolus" you mean for breakfast. Normally I would say if you are crashing before lunch that your basal is too high. But I notice there is only 3 3/4 hours in between your breakfast and lunch bolus. That's close enough together that you could have some insulin on board from your breakfast bolus. My suggestion was to move your meals a bit further apart. (I try and eat 5 hours apart to avoid overlap). I'm assuming you take into account the IOB when you bolus for lunch. You might see how much you have left when you are crashing and compute a small reduction of your breakfast I:C (or just reduce it by one and see how that does for a couple days).
But eating so close together does make it hard to sort through the variables. Rather than making too many changes and having to backtrack, my suggestion would be to move your meals further apart. Then if you are still crashing before lunch you will want to try tweaking your basal by a small amount for that period. (If lunch is at 2, and that's when you go low tweak it at noon). I also wonder what you mean by "crashing" Sometimes people are say 70 or 80 and feel "off" because they're used to being high, when really that is a good number for before meals.
Thanks for the further details, Melissa. Does your blood sugar go up a little from your pre-breakfast number to your two hour post prandial? If, let's say you're 100 before breakfast, then go up to 115 at 11:15, then at 12:30-1:00 you start that slide down to 80 and into the 50s I would definitely reduce your basal rate for the period around 10:30; it sounds like the basal is pulling you down.
But if on the other hand you just keep dropping - like starting at 100, then 85 at two hours then keep going down from there till the 4 hour point then I would alter the morning I:C a point. It might in that case be both I:C and basal. I understand your schedule makes it hard to space your meals, but it does make the cause and effect a tad murky and might take some playing around to figure it out. Depending on your answer to the scenarios I describe above, I would experiment, but only do one at a time - basal or I:C. If you do both together you won't know which was responsible for the change.
Definitely sounds like basal. I usually only make changes in the smallest increments - .025. Then I see how that does for awhile before deciding to drop another step. Since you drop from about 12:30 to 1:30, I would make the change from 10:00 to 11:30 or 12:00 (creating a new "time zone").
I don't work fulltime and work in part from home so weekends aren't different for me. But I've heard other people do. I didn't realize you have only been pumping for a month. It definitely takes awhile to get your numbers in line when you start pumping. I think you're doing great, asking all the right questions and tweaking things as needed!