Hope that I’m not alone...

I have been with my husband for over 7 years and we have a 2 1/2 year old son. Recently I have been feeling irritated and annoyed with my hubby. I don’t feel excited seeing him and I don’t get that butterfly feeling like I used to before having our son. I don’t know if this is due to me being exhausted caring for my son 24/7 or I’m just falling out of love with my hubby. I’m a stay at home mom and my hubby works schedule is untraditional. He’s away from home for 3-4 days a week and comes back for 3-4 days before going back out again. We also move a lot and we don’t have any close family or friends near by. So the point of this post is, I just wanted to know that I’m not alone feeling this and that this is normal and hopefully it won’t last forever. Also I just want to hear others thoughts and any recommendations on how to make my marriage happier.