Missing Period on Cerazette?

I started on Cerazette just over two weeks ago, and was intimate with my boyfriend after five days (I was led to believe I would be protected after five days). We did not have sex, but he touched me and may or may not have ejaculated beforehand, therefore it is possible he may have had semen on his hands. I was under the belief I was protected, however afterwards I realised I had missed two pills consecutively (I'm dyspraxic and as a result not very good at remembering to take medication on time until I get used to it, and my alarm did not go off to remind me). So I had only taken three days-worth. I have since found out that I am supposed to have taken it for seven days beforehand, and panicked and took the morning after pill again (I took it a couple of months ago, and then had two periods that month after taking it) and then continued taking my minipill as directed since (I've now "gotten into the swing of it"). I have not missed another, and have now been taking it for a week. However my period is now a couple of days late (I think it was due to start a couple of days ago, although it may be that I have the date wrong by a couple of days) and I'm now having a major panic attack. Firstly, what are my chances of becoming pregnant if he only touched me after touching himself? My housemates are telling me it's ridiculously low / almost impossible, and only happens very rarely, and that I shouldn't be so stressed out about this. Are they right? I may just be beating myself up over nothing, my period can sometimes be a bit late or early, it may just be that my period is being irregular, but what I really wanted to know was, is this possibly due to starting on the minipill? I had stomach cramps the other day which panicked me a bit. Is it possible that these are both side effects of either the minipill or morning after pill?
I also started the minipill two weeks before my period was due, because I needed to be protected. Is it possible that I am NOT protected as a result of this, even after a week? I'm confused because various different medical sites / contraception sites are saying different things and I'm not sure which one to believe.
What should I do now? I'm majorly freaking out and have no idea what the hell is going on. I tried to book an appointment with family planning to talk to them, but they are booked out until the end of next week. Getting desperate now.
Also please do not judge me or try to lecture me about "being careful" I already know and I'm trying my best. I'm just very confused, not being used to this yet and the waiting list for the implant is really long, so I have no other option.