Trying To Conceive. Irregular Periods, Tender Breasts, Variable Pregnancy Test Results, Spotting. Pregnant?

Hi We are trying to concieve been trying since last september, we both got tested 2 months agao and habbys sperm is good and blood tests say I am ovulating, have irregular cycles ranging from 27 to the longest one 41 which was last months, I actualy thought I was pregnant last month but all the tests i took came out negative and eventually i got my period on day 41 following tow 30 day cycles. this time I am on day 32 and my breasts have been tender for the past two weeks, I tested on day 28 and it was positive ( urine home test) then tested again on day 30 , one test was faintly positive and the other test i took was so faint i wasnt able to judge if it was apositive line or not.. i have just noticed some spotting today and have a doctors appointment for thursday, is it possible to be pregnant and bleed? ..my last menstraution ws actually three days long instead of my usual 4 days and spotting on the 5th day