Anxiety getting the best of me..

Just started a new job and my GAD has given me a hefty case of imposter syndrome. Feeling completely overwhelmed and just generally pretty shit. Dont always like talking to my other half as I know he will worry, which then leads to guilt and hence the cycle starts all over again. Constantly feel sick and stressed and tired and lonely. None of this helps with TTC and that's without the issues I already have. Any tips for escaping your own head?