Sex Timing. Doctor. suggest me doc.

Hello doc, My concern is related to sexual health, my timing in bed is not upto the mark I finish it soon less than 5min, Iam into a serious relationship since 3years, and we have started our sex life since 5 months we just satisfy orally still we have to be successfull in carrier so we din took any risk we have din make out, When she gives me BJ or HJ I finish it early in few strokes, Iam tensed now this may get a negative impact in our relationship, I consulted a local doctor he initially gave me some oils but I refused being educated I don't believe in unbranded one, and I believe in ayurvedic medicine so based on my requests he has suggested me a gel, Himcolin from Himalaya. Before using it I wanna make sure is it safe it's ayur product I believe, But need an expert advice than a local doctor. Suggest me doc. Thanks