2 periods in 1 month?

I am on minipill and take my pill 545 pm everyday. There was a couple times last month where I got drunk and sick at least 2 hours after taking my pill. I had period 7-13th and 6 days later after having sex I started bleeding again the 24-30. It was like regular period . this month I was taking my pill and it dissolved in my mouth before I can swallow it so idk if that would be effective or not but 3 days ago I started spotting pink and that lasted like a day and a half then it stopped. I have not bled anymore but idk when I should expect my next period since I kinda had 2 last month. Is this normal or should I plan to get a test. Me and fiancée don't use anything other than my minipill.