TTC while husband works out of town

so my daughter will be 3 on Christmas and we are trying to have another baby. I got my iud out Oct 23rd of this year and he's leaving to go work out of town again tomorrow. I'm ready for him to go back to work but I'm super sad too bc the past 2 weeks he has been home has been absolutely incredible. Relationship and sex are better than ever ;/ I'm so worried it's going to take so long to get pregnant bc he doesn't know when he come home depending on where he works at. He's going to lousiana this time and we live in alabama