Husband away a lot

Beth
Really struggling today...af showed herself after being late when I really thought this was the month. My husband goes away for work (fishing boats) and sometimes will be gone for a good amount of time. I can't help but worry that he won't be around each month when I ovulate. I think I wouldn't be as worried if I knew that every month we'd have a chance. Does anyone have a husband that goes away alot? How do you deal?