No. Scotland is not being invaded by any country.
Scotland is a constituent nation of the United Kingdom (since the 1707 Acts of Union). It has its own devolved parliament (Holyrood, since 1999) and legal system, but defense and foreign policy are UK responsibilities.
The last foreign military action on Scottish soil was World War II (German air raids, U-boat operations). The last land invasion was the 1745 Jacobite Rising (internal rebellion with French backing), not a foreign conquest.
Current security concerns relate to cyber threats, terrorism, and NATO/Russia tensions—not invasion.