Could I be pregnant?

[Saraahxo]

Well I've been on the pill for over 2 years, and on the 26th of March I had my period which I think was it cause it was so light and it was like a brown discharge, had mild cramps but then it finish within 2 days, a few days later and started taking my pill straight away, I had cramping like 2-3 days after that just for a day, and then I started getting really sore boobs and nipples 2 weeks before my next period and they got bigger to I started to feel sick to certain foods (eggs) almost made me through up, and certain smells to. I took 6 pregnancy test, 3 had very faint lines (first response) and a not
Pregnant clear blue, the rest just said not pregnant. One of the test I did when I first woke up had the faint line and the other was at night aswell as the clear blue. Now I'm due 23rd April for my period and I had sex unprotected on the 16th, 17th and I forgot to take the pill for the 16,17,18 I haven't taken it now being the 19th cause I'm not sure what to do, and now I have brown discharge and cramps.