Is It Okay To Take Nordette Frequently?

Hello, i used nordette as ecp sometime sept 20-24, not sure. i had my period sept 9 to 13. I normally have a 33 to 34 day cycle. i had to use it again as ecp last sept 29. Both times i drank 4 tablets, then 4 tablets again. The first time, i took the second dose exactly 12hrs later, the second time, i took the second dose 14 hours later (since i lost track of time). i had withdrawal bleeding for both times. i m supposed to have my period Oct 11, but still no sign of it, no symptoms whatsoever, no breast tenderness, etc. which i usually have. so now im almost a week late. I know it may be because of the ecp, so im trying not to stress about it. am i correct or do you think im pregnant? :( problem two is- now, i need to take nordette again, (this will be the third this month), is it okay? or is it unnecessary? did i ovulate this month? Did nordette stop it or delay it? as much as possible i dont want to take ecp again, so if the pills i took before prevented the whole ovulation phase, then i would not need to take nordette now *fingers crossed* should i take it? i know it may be unsafe. but i just want to know if there is a chance this last time can make me pregnant. i also know its better if i just take regular and more reliable modes of contraception and that is what i am planning to do. i just need to get this problem off my mind before i start taking regular pills on my next cycle :) nordette is the only form of ecp here. thank you so much!