@Prathu,
Well I've got some questions.
- Where are you in your menstrual cycle? Some days are more fertile than others.
- How old are you? How old is he? When we get older, fertility falls off for both genders. Doesn't make conception impossible but it can reduce the likelihood.
- Did he ejaculate every single time? Again, this can lower the chances of conception but it doesn't eliminate them.
- You ever actually talk to your husband about not wanting to get pregnant?
I'm asking the last one because this is not a one-person operation here. If you two are not on the same page with this, then you are going to have to step up and be A LOT more proactive if you don't want to get pregnant.
But talk to your husband because maybe he doesn't want you to get pregnant, either. You won't know unless and until you have that conversation.
As for right now, there are morning after pills - try a local drug store. I'm guessing you're in India - emergency contraception is legal and available there. See:
https://gynopedia.org/India
If you're in the US, this site will help you find emergency contraception (and you may need to cross state lines):
http://ec.princeton.edu/questions/state-pharmacy-access-list.html
If you are in any other country you will have to say which one it is so you can be helped better.
And now - FROM NOW ON - the medicine to help with this is for you to get on birth control before you have sex. That means the pill or an IUD or an implant. And if there are any doubts as to disease status then that ALSO means condoms.
This is your life we're talking about here.
And if you can't take or use birth control because your husband doesn't approve, then you've got problems that go beyond emergency contraception. And if you don't use birth control because it's too expensive, kids cost A LOT more.