Not lubricating?!

So I'm a little over 8 weeks along, and even if I'm aroused I can't lubricate! Wth? I don't want my boyfriend to feel incompetent in bed because that's not the case at all, I want him and he pleases me. But no matter how much he tries I am dry as can be. Last night it was excruciatingly painful and I don have the heart to tell him. I'm buying a bottle of water based lubricant today but we have never needed that before. So as a Hispanic man I'm sure he'll be offended, but my comfort comes before his ego. 
Anyways, this is my 3rd pregnancy and I don't remember this happening with my other 2. Will this last the whole pregnancy or is this something that should go away soon? And of course my luck is that I just saw my ob last week and now I don't have an appt for another month 👎