Send help!!

Morganne

So my husband and I got married in October of 2018 due to a family illness. We had a big family wedding in May of 2019, we decided to wait to start trying until after the May wedding, we went on a honeymoon cruise and decided that would be the perfect time to try. When we are away, I had spotting, only after sex, and only for three nights. After we got back I checked my app and everything lined up I should have started my period but I didn’t. That was a month ago, but my last full period was in February and I had a very rare three day period in March. I am now 52 days late and I have taken 4 pregnancy tests, two at home and two at clinics. All negative. But I still have symptoms. Anyone else suffer from this, or know what I can do to go know why this is happening?