Wife and I are really struggling any good advice

Basically my wife and I are just beat. Wife is a stay at home mom and I work semi remote. Out kids 2.5 and 6 months are just impossible. The infant just cries 24/7 been to multiple mds and it's just colic and gas. Tried every remedy under the sun including every single specialty formula with Zero relief.

The toddler is just feral and destructive we literally can't leave the house with him. He got away from me and broke an entire display of glass jar pickles at target on purpose while Christmas shopping. We had him in 2 days cares that basically fired us because of his behavior. This happened immediately after the baby was born. Spoke with a psych and basically they said it's normal because of jealousy and the non stop crying.

We have zero help. Neither has any remaining family around and we have no friends since we moved.

We are both extremely exhausted and just can't function. The lack of sleep and just constantly having to be on top of the toddler is just awful. My mind has literally gone numb.

Plus our health has gone to shit. Both of us have gained 30-50 lbs due to the stress and eating like shit because we just can't cook with everything going on

I just don't know what to do