I still do manicure just make sure you dont't inhale fumes, so find a well ventilated salon. Travel depends on how delicate your pregnancy is, mine is delicate and have one threatened miscarriage so banned from traveling. There's this huge taboo about eating sushi, advice is to eat well cooked food to avoid listeria and bacteria which can harm the baby and cause miscarriage. Fatigue is normal, I nap half the day, and I get cramps and sore back. You need to go to your gyne and check that the baby is where it should be (not an ectopic pregnancy), if it is, the cramping can be just your uterus and ligaments expanding.
Hope this helped!