Hi there,
It is quite normal to have some discomfort after
Plan B because it will upset your normal cycle of hormones. You have many factors that make you less likely to be pregnant - the intercourse was during a period of low
fertility, you took the Plan B early, and you had a decent amount of bleeding afterwards. I would not recommend repeating another urine
pregnancy test unless you're late for the next period. This should be estimated to be a full cycle after your last bleed, which is usually 28-30 days after the 6-day bleed with Plan B, depending on your normal cycle. Doing a urine pregnancy test so early on is not accurate at all, because even if you were pregnant, the hormone levels are still too low to be detected on the urine.
If you are a week or more late, then proceed for the urine pregnancy test. If still unsure or you are very worried, you can drop by your local doctor's at any time for the beta-
hcG blood test, which is a lot more accurate in the early stages.
If you would like some medication in the meantime, try an anti-inflammatory like
mefenamic acid for the discomfort.
Hope this helps, and all the best to you.
Regards,
Dr. Teh