Pregnant again whilst on mat leave

Hi everyone, so I recently found out I’m pregnant again, I’m currently on Mat leave and due to return in October when I’ll be around 4 months. I’m so scared that my employer will not be happy about this and make things difficult considering I would only be back for 4 months and then be off again. I think I’m basically just seeing if any one here has been in the same situation and how that went?