Not a lot of income/budget info, so:

The increase in your escrow is an interest free loan. If I were in your shoes I would avoid stretching it out longer with a loan which would add interest.

In short, I'd look to cashflow it as much as I could with current savings and within my current budget.

The overall shift in mortgage payment from 1100 to 1650 (after you cashflow the shortage) is the longer term question.

If you don't budget, I'd start. It will answer a lot of questions about options down the road.