Hurmat e musarrat doubts

Assalam u Alaikum few days back i read about hurmat e musarrat since then I am having wasawas. Yesterday I was giving medicine to my father and was reciting Astagfariullah while giving only tip of his fingers touched centre of my palm.i just felt the touch sensation and was reciting Astagfariullah in heart. Now at that time after it happened i felt there was no lust but now having doubts what if there was lust. I am really disturbed this whole thing is so disgusting for me . What should I do is it really hurmat e musarrat. I can never imagine having such feelings.i am feeling guitlty infront of my father .
Can i adapt opinion of shafi fiqh since this thought is making me uneasy and i can’t concentrate on any thing.