Weight :(

So I just weighed myself and I am a disgraceful 17 stone!! How horrible is that? I'm 15+1 weeks pregnant & the weight is just piling on!! Im not over eating and yes I could eat a bit healthier & be a bit more active.
I'm so scared I'm just going to be a big fat mess. I hate looking at myself in the mirror it's shameful!
What my fiancé sees in me I do not know!! Any advice on what I can do to help lower the weight or not gain so much ? 😭😩😭