Brown spotting observed which is unusual

I had my LMP on 5May and i have 28 days cycle. I had an oral sex on 12 May and my partner rubbed his penis over my clitoris and vaginal area but there was no intercourse neither did he have any secretion. After 2 days i am feeling unusual pain in my stomach and am noticing irregular brown clots with white discharge which is not regular bloodflow but is seen at random intervals when i wash my private area. Again on 14th we just had a quick session where he just fingered me but he applied a bit pressure too but that was tolerable. (Please note i am virgin.) Is this blood/brown spotting because of this? Is there any concern of early pregnancy or anything of sorts? We are not planning to get pregnant right now. Please advise as to what needs to be done!