Im in the same situation except valentines day is more of our anniversary and its like we cant do much since im due right before. So by the time it comes we will have a new born on top of having our toddler so who knows what i will do. Just get him something he likes. For instance my husband loves anything thats for tools or his car or he even wants a new watch just look for the signs
Gift card for his favorite coffee place with a bag of their coffee. Google play or iTunes gift cards. GameStop GC if he's a gamer. you could do like a couples massage/spa day.
This might be lame.... But a coupon book? You could do things like "get out of diaper change for a day" or "free foot rub" or "favorite meal for dinner". I know it sounds lame but when the baby comes it gets tough to find time for just you two. So that could help. I just wouldn't put in too many coupons or you'll be exhausted fulfilling them. Haha just an idea.