I was on the mirena for 5 yrs and then on the depo for 2 yrs

I was on the mirena for 5 yrs and then on the depo for 2 yrs. Oct2015 I decided not to get the depo... January 2016 I finally got my period, it was irregular at first being back to back in January. February I had a normal one then after I was taking ovulating test which all of them said negative so I bought PreSeed and only using it once and take prenatal vitamins once in a while.... I was so scared I wasn't going to get prego since the test said I wasn't ovulating...... This month I was due to start March 22 and it didn't come mean while I have been feeling nausea, so yesterday March 24th I decided to take a test and......