Hi! No need to worry. Permanent teeth can often take 6-8 months to erupt. Meanwhile maintain good oral hygiene and observe for another 2-3 months.
If there is still no sign of a bulge or an erupting tooth, an x-ray would help to determine it's position and estimated time of eruption.
Next Steps
Wait and watch for 2-3 months and get an x-ray of the required tooth if it is still unerupted.