100 days till wedding and fight

So the fiancé and I have 100 days till our wedding , seems here lately all we do is fight . It's every other day we go without talking. He just started a new 3rd shift job so a lot of our time has been cut out . And I'm not getting no time to myself I have the kids 100% of the time and it seems like the biggest struggle to get him to even watch the kids for 30 minutes. I just don't know what to do . I'm so in love I just don't know how to marry someone if we can't get along . What do I do? Is there anything we can try ?