I desperately need help😫.. may be a little long but please read!

I've gone through two miscarriages before..

I'm usually irregular, for example I'll get my period In January and I'll skip February then it'll come in March I'll skip April etc etc...so I didn't get my period Last month as usual. I expected that but today is the last day of this month and I still haven't gotten my period like I normally do... because Im irregular I have two apps that I have for more accuracy or ideas of when to expect things, and on one of them it says that I ovulated March 20th me and my fiancé "baby danced" every single day throughout that window And that same app said that I was supposed to get my period April 3rd but I still haven't gotten it my other one says I ovulated April 12th and it's predicting that my period Should have started 26th of April I still haven't gotten my period. And I'm having every single pregnancy symptom, for the last two to three days I'll say I gotten sick/ a fever. I couldn't get up on myself my WHOLE body was in pain I had a massive pounding headache my boobs were swollen and heavy and I would get mild cramping. Today my pounding head went away but my nose is still blocked up I'm dizzy and nauseous. I slept in late and I got up to cook some scrambled eggs.. smelling them cooking made me nauseous and as soon as I put them on the table I ran to the garbage can to throw up. on the 28th of this month so just two days ago I wiped and I found like a brown discharge on the toilet paper (tmi) but not in my underwear and I haven't gotten it since. I've taken two really cheap pregnancy tests yesterday, one neg the other dye run.. Today I took one in the afternoon and neg..I'm going to wait and take a few other tests next week with a first response which is what I took with my second child I trust them more, I took 3 all positive. I also took the cheap pregnancy tests and they gave me negatives as well when I was pregnant with my second. Do you think I have a shot at being pregnant? Did I ovulate/ implant late?