I Am 32 Years Old And I Have A Regular

I am 32 years old and I have a regular cycle of 31-34 days. i had also had 2 previous successful pregnancies. However I am now on cycle day 48 and have had two negative hpt's. Have had mild intermittent abdominal cramping since 4 days late but no spotting. Frequent urination, swollen breasts but no pain, and mild cold symptoms that started a week after missed period. Appetite has also dramatically decreased but no nausea. Also have had increased pale yellowish discharge (odorless). Been actively trying to conceive with my husband for 2 years and not sure what to make of this cycle. Can an undiagnosed cyst cause this? Or a late implantation?