Does the morning after pill work 2 days before ovulation?

You don't say which of the 2 types of pill you took (Levonorgestrel or Ulipristal Acetate), but if you definitely weren't within the 24 hours of ovulation already, then either pill has a chance of preventing pregnancy, but neither is guaranteed.
The only pill that's proven can prevent pregnancy during the 24 hours around ovulation itself, is Ella (Ulipristal Acetate), & even that's not guaranteed. You can see that on the Manufacturer's website. Levonorgestrel (Plan B/My Way etc) may help during that time, but has not been proven.
Here in the UK, if you're within your fertile window, the pharmacists give Ella (Ulipristal Acetate), rather than Levonorgestrel based pills.
If you ovulated within a couple of days of taking the pill, then it suggests it didn't manage to delay your ovulation. It's possible it may work in other ways to prevent pregnancy.
I don't know how accurate an ovulation test would be, after using an emergency contraceptive pill, neither.
Your only other option, at this point, would be to have a Paragard IUD fitted by a doctor within 5 days of sex. That can prevent a pregnancy implanting.