Timed intercourse with trigger

Ashley

I triggered on the 19th. We are doing timed intercourse and bd quit a bit. I tested out my trigger shot and it has been out of system since the 27th. I have been really nauseous, dizzy, exhausted, heartburn, and breast and nipples are very sensitive. I haven’t been this sick since my first pregnancy. I took a pregnancy test today and negative. Is there still a chance I can be pregnant? Period is due tomorrow.