Help! TMI constipation ☹️

Haven’t been to the loo since Tuesday (sat now) which is very unusual for me. I’m taking lactulose which has been prescribed by my doctor and I’m on day 2 of that, any other remedies to help move things along? I’ve upped my water intake and had bran flakes for breakfast which i don’t normally as it causes me to have diarrhoea but nothing yet 🤷‍♀️ getting uncomfortable now and not wanting to eat too much cause I don’t want it to get too back up in there ☹️☹️ 13+3 weeks today 👍🏼