Is the test line getting darker?

Just did my 5th <a href="https://glowing.com/glow-fertility-program">IVF</a> cycle (at 41 years old). NEVER had a positive test. Ive been testing the past 3 days- 5 days post transfer, 6dpt & 7dpt (today)... Are my test lines getting darker? My friend thinks they are but they all look the same to me.