Oh OP, I remember these feelings very well and know what a horrid and scary space it is in your head.
my DD is now 3 weeks old and I can promise you, it gets easier. Your anxiety coming up to the 12 week scan, the thought of the huge life changes and being in charge of a tiny human combined with a huge surge of hormones is what will be triggering your anxiety.
I had all the same feelings, especially about my partner. Suddenly your making a huge commitment to have your partner in your life in some way forever - and it’s scary! You need this person to support you during your most vulnerable state, and the fear of them letting you down can be horrid.
BUT
Youve said he’s your soulmate, so you know how you truly feel about him. I use to have conversations in my head, every time I had these thoughts I would counteract it saying ‘ don’t be stupid, you know you love XXX, this is just the hormones talking’. By mid second trimester, when the hormones are levelled out slightly it does ease I promise!
Whilst communication is so very important, if you suspect this is just anxiety talking with no substance behind, I would be careful how you communicate to your partner your feelings. Saying ‘ I’m not sure we should be together, I’m not sure I love you’ could cause irreparable damage when your feeling better in the future. This is a scary time for both of you, remember your on the same team.
and please don’t feel like your feelings are abnormal, I know many women who have felt the same but it’s not often talked about because having a baby should be ‘nothing short of magical’. Not many talk about the negative feelings that can consume you