So I had sex with my boyfriend in the month of feb, didn't remember the exact date, I had an I-pill and I even got my period in a week or two, but there is a miss in periods in the month of march and April, so should I take a pregnancy test?

Yes, take a pregnancy test. For maximum accuracy use first morning urine and read the test within the allotted time given in the directions.

Is there any chance to get pregnant still.. if I got period after having an I-pill?

You were given an answer - YES. Do you not see it? It isn't going to change.

You might not be pregnant too, but no one can know until you do a test.

It's possible the bleeding you had was caused by the Ipill and not a true period. No form of birth control is always 100% effective. Pregnancy is always a possibility.

It's time to take that pregnancy test.

Yes the I Pill is not 100 pecent effective and less effective the longer taken after sex.

It should not be causing two missed systems. So it is time to take the test.
Do it first thing in the morning, as soon as you wake up. (or go to doctors office)