Actually a morning cup is fine, but to be safe I would suggest that you limit your daily consumption to two cups (since some coffees may contain as much as 100 mg. each). A very extensive study a few years ago looked at women very early in pregnancy.The study found no effects on the fetus when moms drink up to three cups of coffee a day; very few women drank more than that.A more recent study found an increased risk of miscarriage when pregnant women drank more than 200 mg of caffeine per day.
What little evidence there is indicates that getting a perm or chemically straightening your hair is no cause for concern. The fumes might be annoying, but the exposure probably isn't significant enough to have any effect on your baby. Some hair-processing solutions may use solvents, and while there is concern about the effects of solvents on a developing baby, that's most likely an issue only for women who work around solvents all day and develop symptoms from the exposure.