Am I alone or what?! Does your Hubby/bf do this?

Okay I am now 16 weeks pregnant and I have been craving some special attention if you ladies know where I'm getting at....

My husband works a lot and wears out by the time work is over.. So it is rare when I actually receive this attention...

When I do however get this attention, he can only last for 5 minutes; therefore leaving me frustrated!!  This was not a problem when we were not expecting.. he could go for at least 40 minutes. He says it just feels more intense now that I'm pregnant.

Ladies is there anything I can do for this?
Is this just happening to me? :(