After a quick detour for still more bloodwork, I went in today for the aforementioned methotrexate injection. Now, methotrexate works by interfering with rapidly growing and dividing cells — i.e., an embryo. Or a tumor.
That's right. Methotrexate is used to treat cancer. The pharmacy gives you the medicine in this big lightproof bag with fluorescent stickers all over it: "CAUTION: CHEMOTHERAPY!" and "DO NOT HANDLE WITHOUT PROTECTIVE CLOTHING." It makes you want to use tongs and gloves just to carry the bag back up to the nurse (who then dons a disposable gown, gloves, and fetching plastic cap, of course).
It seems like a scary drug, but apparently it's very successful in treating unruptured ectopic pregnancies. About one patient in 20 will still require surgery, but I have no intention of being among those ruptured few.
The injection itself was uneventful. I was given a stern talking-to about the absolute necessity of follow-up bloodwork on a weekly basis, and a long list of things I must not do: