Can implantation be 8+ days?

I was expected to have my af on 3/8. 3/7 I started to spot light pink w discharge. Thought af was coming cuz I normally spot a day before and after. Been spotting the whole time some times pink. Other times light brown. Last 3 days it's been the light brown. But period never came. Not sure if I've ever had implantation spotting w other 4 pregnancies cuz they were irregular w them. But now af has been around the expected time w spotting at ovulation time. FF says I O'd 2/25. We did have sex that day. Been feelin nauseated from afternoon till morning for 2 days now. I did have morning sickness in eve w all pregnancies. So I'm wondering if this is implantation or did my heavy periods turn to skanty period all of a sudden. I should say af lasts 6-7 days and lp is approx 11 days. Been tryin to conceive for a year now. Cycle is average 24-26 days. Now can I get some opinions. Pleez. Thanks in advance.

[sprarah]

Probly not implantation bleeding but could be bleed cuz you are infact pregnant....take a test.

[Lowlow78]

Thanks. That was another thing I was thinking since I have a problem w progesterone when I'm prego.