Bumps on penis std or sti? Help pls

i noticed these bumps that lasted 3 days almost a week or 2 after i had unprotected sex on the last day of the month and did not get a appointment untill the 17th of the next month was i to early for accurate std test all my test came back negative. but i am worried because i am now feeling a itch on the penis gland or shaft or the inside kind of hard to tell where its from. no pain or pain when i pee or any discharge. i wonder if its from the lady i had sex with or was it from when i would masterbate in the mornings and not clean off excess sperm ? because a week or 2 before i had sex with the lady i found a white layer around the head of my penis i got scared and showered and scraped off the white layer i had no idea what it was but i scubbed it as hard as i could till it came off here is a picture

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