2nd Degree Tear

I am almost 11 weeks postpartum. I had sex for the first time last night. I have been itching and burning along my tear the past week, more than normal. I decided to take a look this morning to see if everything was okay since I was nervous about sex last night, and I noticed I have this red bump. I did NOT have this a couple weeks ago. Is this normal?? I have a scar tissue, according to my pelvic floor physical therapist. I am nervous this could be something bad.

*We did not use lube.*