When I asked my clinical nutritionist at the hospital, she highly recommended guava for its fiber content. But always wash fruits under running water to avoid any infections.
I felt so many weird cravings early on, and ripe guava with a little salt was my absolute favorite! It is completely safe and even helped with my digestion.
I know how stressful it is to worry about what to eat in the early weeks. Guava is actually very good and rich in Vitamin C, just wash it thoroughly before eating.