If you are worried about Lyme disease, I would see my Dr. Studies have shown taking Doxycycline in the first 72 hours after a bite, it could actually prevent Lyme Disease.
Having blood drawn to test for Lyme Disease (Lyme Titer) would also be something else you could think about. The best time to have the blood test is six weeks after being bitten by the tick if there are no symptoms present. Your body takes about this long to form the antibodies to the disease that the test is looking for. If symptoms do exist this is a sign that your body is trying to combat the disease and the test can be done sooner.
However, antibiotics taken in the early stage of the disease may prevent a person from ever making antibodies....and you would end up with a false-negative. Your Dr's judgement will be best here, especially since you are trying to get pregnant.
I want to always encourage you to save anything you remove from your body like you have done. This is always a good idea.
Please ask for clarification if needed.
Yes, you can go ahead and follow her directions. It certainly will not hurt.
Thank you!! Good luck!