So confused .. could I be pregnant?

Tamarah

Hi ladies. So I got off the pill at the end of May. I had my withdrawal bleed May 29-June 1. My natural cycle then came July 1-5. I ovulated around the 13. I had some bleeding that seemed to be implantation bleeding from July 17-20. It was inconsistent with my normal cycle and no real cramping at all. I have had some crazy insomnia, and daily mild nausea. Also, TMI but I had bad gas for the past 3 days. Took a FR HPT this morning and it was negative. Is it too early to test? It says that it can be up to 6 days before your period and I should be about 5 days before now but prior to the pill my cycles we slightly irregular so I’m not all the way sure. I have also been having some slight pain on my left side and my back was sore yesterday. I am imagining things or could I be pregnant??