Welcome to HCM
Please don't blame yourself, many women with young children get stressed out after meeting their Childs and families demands.they feel frustrated as they can't devote time to themselves or spouse.
First of all make sure you always use contraception either condom or pills if you are not ready for pregnancy
. This will decrease your anxiety
Talk to your husband about your fears and try to listen to his problems too.
If it's disrupting your life visit your doctor who can help you out.
Don't worry ,soon this phase will pass on as your child grows.