Sleeping...apparently a thing of the past

Our latest challenge with Dane just started about a week ago, and we wonder if anyone has experienced a similar situation or has ideas for why it's happening or how to get past it. Basically, Dane was doing pretty well, giving us a 2.5 hour block and then a 5 hour block in between his night feeds. Right around Mark's graduation however, he started having a regular screaming spree, starting around 10 each night and going progressively longer. Last night, Mark was up until 2 after his 10:30 bottle. We tried everything, changing him, giving more food, walking with him, putting him in his swing, changing how we held him every few minutes and nothing seems to work. It's like he's chosen this time of night as his angry time and we're just praying it won't last long. Mark starts residency tomorrow, and I start work the following week, so we're going to have a long week, where I'm alone with him all day (which basically means the entire day is taken up by feedings, as when I feed him alone - due to pumping and breastfeeding - each feed takes between 1.5 and 2 hours). Mark will be pooped from all the new stuff he's learning and will have to be out of the house by 7 am, which doesn't allow much for sleeping in if we've had a rough night. For the last few nights, I've gone to bed after breastfeeding and pumping, around 11:30 or 12, and Mark stays up to finish his bottle and put him down. Then, I let Mark sleep through the 5 or 6 am feed, giving him (since we've been getting up around 10), around 7 or 8 hours of sleep. However, once work starts, we'll have to be up much earlier and won't have the benefit of sharing feeds. We're both pretty nervous for how this is going to go, and I'm definitely looking forward to my mom arriving to help on the 22nd. We think Dane may have colic, given the number of hours and time of day that he's been crying lately and have tried Hyland's Colic Tabs and Little Tummy's Gripe Water, to no avail. If anyone has any suggestions for either what works to curb this, how to schedule him better, or when their little one finally got out of this phase, PLEASE let us know! We're feeling a little desperate, as most babies are out of this stage long before 3 months (but since he was a preemie, this is probably normal). We feel like we've been dealing with struggles for him since he came home; every time we feel like we're figuring something out, he changes, so we're really just looking for some hope that he'll start to be happier/more consistent soon.