Could I be pregnant?

I'm on the pill Microgynon 30 and take it everyday, however last month I ran my packs together so I didn't have my break + bleed. Since January I've had sex on 19th + 30th January and the 6th of February. So the last time I had sex was 3 weeks ago. Each time I haven't used protection because the pills always been enough (been with my partner a year and a half and never used protection, always been on pill) but the last week also I and my partner have noticed I've gained a lot of weight and I feel sick at random times of the day whether I've eaten or not (I know this might not be pregnancy still thought I'd mention it) but the past week also When I've gone to the toilet (sorry tmi but...) it's been much softer than normal as if I have a bug or something that's making me ill... But I feel tired a lot recently and some days I feel much more bloated and bigger than I've ever been in my life. I don't think I could be and surely symptoms wouldn't start this early? However it's just on my mind and I don't want to think myself into a panic... Someone please reassure me lol. Also if i do need to take a pregnancy test which would you recommend to use at this precise time? Thanks!