Sex during pregnancy ?!?!?!?

So I was just wondering if anyone is going through the same thing I am . I have always had a very high sex drive and being pregnant hasn't changed that but it seems that when the time come my body isn't responding like it normally did . The last two times my husband and I have tried to have sex I am so incredibly dry and even after 15-20 min of foreplay it still doesn't help . Is this normal during pregnancy ??