Helen's right. Sometimes the HSG itself can unblock tubes if they're not so bad. Have you had an HSG? You can get a normal period each month and sometimes not even ovulate, so please make sure you get everything checked out if you're ttc.
Good luck!
Trish
If both tubes are blocked, getting pregnant would be almost impossible without surgery to open the tubes. Do you think one or both of your tubes are blocked? have you had an HSG done?