Hi.. A Few Months Back.. I Was With My Boyfriend..

Hi.. A few months back.. I was with my boyfriend.. He didn't penetrate me.. But there was semen on my vagina.. I thought I was fine.. Then i skipped period for two months.. I couldn't go to the doctor because I was travelling..a lot.. Second month end.. I got the most painful period ever.. And it was very unusual.. I could see tissue like big lumps.. Are there chances that I was pregnant and I didn't know I had a miscarriage? I am not the same from that day..