Period is a week late no positive test :’(

I’m new here :) but, on January 23rd 2018 I was 23 weeks and 3 days pregnant with my precious baby boy unfortunately he was stillborn :’( I miss him terribly!! I’m doing a lot better since I’ve lost him I still miss him so much and think about all the time. I went for my 6 week follow up appointment with my ob doctor and got a good report he told me I healed up great and everything was back to normal as he gave me the ok to start trying to get pregnant again when I was ready so I didn’t go on any type of birth control. I stopped bleeding on March 1st but I’m pretty sure I had my first minstrel period on February 23rd. My husband and I have been trying again. Well, my period is a week late I’ve taken like 4 tests all showing negative :( I’m really hoping to be pregnant. I do have some pregnancy symptoms but not getting a positive. What is some advise for any of y’all? Should I wait a little longer and then rest again? I know when I was pregnant with the baby I lost before I ever got a positive I was 6 weeks before it would show up on a Home pregnancy test. I’m really wanting my rainbow baby!!! I have a feeling I might be pregnant just wished I get those 2 pink lines!!! Any advice would be much appreciated!! Thanks :)