Pregnancy query

[Nikita023]

Respected sir,

I am 21 year old and my boyfriend is 22 years old. We both are virgins. Last week we got really excited and a little careless. On 10/8/16 (Wednesday) he fingered me (only till the clitoris and openings) following which I had an orgasm. After that he gave himself a handjob and wiped the ejaculation with a handkerchief. After 7-10 minutes he started to finger me again near the clitoris and vaginal opening which was still wet but did not have an orgasm again. But he gave himself a handjob again over my waist/stomach. On 11/8/16 (Thursday) similar thing happened once. My period was due on 8th but had none until 10th. But after the fingering, Spotting was there on both the days. On 12/8/16 (Friday) I took one pregnancy test in the morning (not the first urine) and one in the afternoon, both of which gave negative results. To be on a safer side I consumed one 'Unwanted 72' before 55 hours. Since friday, I am having a heavy flow of bleeding which I think will end in 2-3 days.
Are these periods? Is there any chance of me getting pregnant? Is there any chance of sperm staying on the finger tips even after being wiped? To confirm, which is the appropriate time to take another pregnancy test? What do i do further?