I cannot see the gumminess on the tree in your pictures, but this website: plantvillage.psu.edu/topics/apricot/infos  describes the disease Bacterial canker as causing cankers at the base of flowers and leaf buds and pruning wounds. The canker exudes an amber colored gum. Disease emergence favors high moisture and low temperatures in the spring, which describes this spring. Young trees are particularly susceptible, as are trees grown in soil that drains poorly. It suggests applying protective copper spray before flowering, and pruning trees in early summer to avoid bacteria entering pruning wounds during wet, cool springs.
If you have to replace the tree, look for one that is resistant to bacterial canker.
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