My ovulation & period dates keep changing,advice please!

Hello all,

My af came in September last year after the depo shot. Since then my cycle has varied from 30-32 days. January i was very stressed and so my feb cycle came at 36 days. Glow has since changed my cycle to 36 and I was apprently ovulating last week 21st. I tested every day til 2 days ago and they were all negative. Everytime I recorded a negative result glow extended my fertile window and delayed my expected af date.

Im so confused!! I don't know when test for ovulation or when my period will be due unless i get physical signs :(

This is my calender now, Any advice?

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