Cycle of 35 days and still negative :(

Has anyone else had a cycle that had lasted 35 days or more? Had my last period on 30th June and didn't have sex until at least the 16th July. Got some symptoms such as tender, heavy enlarged breasts, feel nausea and really tired but also had some cramps and pain on left side for days 30-33. Taken 2 clear blue tests and both have been negative. Doctors apparently don't do anything now and you have to see an antenatal nurse in the hospital!!