help me!! I can't poop 😭😭

currently 14 weeks pregnant and have been constipated from the start. But lately it is really becoming uncomfortable. I have tried metimusal (sorry, spelling?) I eat a bowl of Fiber1 every morning, I eat high fiber foods. But nothing is working. I am tired of little rabbit poops. I need a good hardcore shit. pardon the language. any suggestions!?! I have a doctor appointment in 2 weeks so I would like to find a solution before then as it's hard to take time off of work. thank you ladies!