Hi. I Am In A Scary Situation. I Have A

Hi. I am in a scary situation. I have a regular menstrual cycle- 29 Days. My husband and I were trying to conceive last month since I track my period every month my ovulation date was 21st of Sept. Last period I got was Sept 6. We had sex on the 19th and the 21st of Sept part of my fertile period, as well as the 24th and 26th which were not part of my fertility days he ejaculated inside me each time. On the 28th I was taken advantage of by another man, however the man did not cum inside me. I took a plan b immediately. My period was scheduled for Oct 5th so I took a pregnancy test Oct 7th and tested positive. Is there any way I can confirm that this baby is my husband's ?