what are the chances? long

I had sex nearly 3 weeks ago (9th oct) a few hours after my period had ended, the condom failed so i took plan b 8 hours later. i had sex on monday 16th at 1am and again the condom broke so i took plan b again 10hours later. According to glow i only ovulated either yesterday or day before (19th or 18th) but plan b delays ovulation right? i have a 28day cycle and im expecting my period on the 2nd Nov. I know taking it twice in one cycle can cause havoc with my body but ive only been with this guy for about 2 months and already have a 16month old with my ex. I have been feeling a bit sick the past few days and spotted 3 days after the first time taking plan b but nothing after the 2nd. Im so worried, every twinge or sick feeling and im freaking out! I should also add i have a doctor appointment later today to get on birth control as condoms obviously arent working for us. Do you think i'll be okay? When would be best to test, is it too early still? Im really worried