Drying During Orgasm

I don;t know if anyone else has had this problem but it seems to be happening more to me lately and Im getting alittle worried.  My husband and I has been having sex every night for the past 3 weeks.  Within the past week it seems that everythings is fine, we have plenty of foreplay, I have no problem staying lubercated during sex.  I orgasm atleast 6-9times, but it seems towards the end, Im orgasming but there is no lubercation, its dry.  I can feel the sensation and feel the climax but nothing, dry as a bone.  What could be causing this?  Any suggestions or comments would be greatly appreciated.  Thanks

[mama_triplets]

as odd as this may seem you could be orgasmed out by the end. if you take a break you should be fine once you start again. if not go to a doctor