16DPO. Still negative

So many symptoms, approximately 16dpo. Which glow changed from the 17th to the 20th. Sore breasts, nausea, mild cramping, headaches, exhausted, more frequent bathroom breaks than normal... and no sign of AF, but still BFN... my sister and I both had out cues the same time last month.. June 2... due July3. She already got a BFP! Which I'm so excited for her, but a tad jealous since she doesn't know if she's ready for a second baby (her first just turned one in march, and her due date would be her daughters second birthday which I think is cool). But I want it more than anything and am sitting here stuck in limbo... it'll be my last baby... I just want to know if I am or not, and really just want us to be pregnant together. Would have conceived father's day weekend and would have wishful baby on my DH birthday...