I need some help!

I have been having unprotected sex with my husband for almost three years, we are trying to have a baby but nothing is happening :(

My period is almost 3 months late, on June 11th. I have had periods that were 2ish months late before, but never one this long. Around May 29th I thought i was going to start my period because I was cramping and I have a small amount of dark red/brown discharge. It went away the same day. Today, June 1st, It happened again but it went away. I have been feeling like I’m going to throw up for the last two days. In mid May i took 2 pregnancy test and they were negative.

Has anyone else gone through this and WAS pregnant? I want to be pregnant so bad it’s crazy!!

Please Help!