E.:
I know how confusing this must be for you.
After 3 months, your body stops producing the HCg hormone that a urine test looks for. At three months, your breasts should be getting a little bigger and your abdomen/uterus will be expanded a TAD (not a lot)
However, I personally don't think you are pregnant - it's entirely possible that the birth control that your Dr gave you was too strong - had too much hormone in it and your body is messed up. There are Drs and people who say "any blood - spotting or otherwise" constitutes a cycle. This is why I think the pill your Dr put you on was too strong for your body.
If you are pregnant and this is what you want CONGRATULATIONS!!! If you are not pregnant - have this new Dr run a blood test to check your hormone levels and change your birth control pill - if you are trying to get pregnant - it's important to have a marker for your hormones.
I hope this information helps you!!
Best regards,
Cheryl