Freaking out about gaining weight!

I am a heavy girl & I am always trying to lose weight & now I'm scared to gain more weight 😢 I'm afraid I will just look fatter & not pregnant!! I'm 7w today & my husband keeps wanting to take pictures & I won't even look that them... I feel like a rude bitch, but I can't help it!! I wish I had the excitement that I see all over this page...