Gingival Recession under 6th tooth.

26th March: RCT started on my 7th tooth on the right side. After two more seatings the final filling done on 11th April. Crown placement is pending. 16th Apr: Right Wisdom tooth extracted. 23rd Apr: Stitches removed. During this entire process, there was no problem. No pain during the weeks between the RCT seatings. No Pain around the extracted wisdom tooth, after stitch removal. However, since 27th April the gum under the 6th tooth on the right side, has been being swelled. Got it checked with my dentist and also couple of other dentists. They told nothing to worry about. One of them told it could be due to Gingival Recession ,caused during the tooth extraction surgery. And this should get recovered automatically in some days. Suggested to apply Rexidin m forte gel at that swollen area. Photos attached. 1) Swelled gum, 2) OPG before the entire treatment. Looking for the opinions from other dentists here.