My period differences are freaking me out!

UPDATE: All clear. 🙌🙌 😰 Stress, weight gain, and ear infection meds are to blame for my irregularity. Thanks for the support ladies.

I've been using this app for about 2 years now and I tend to read stories and take polls here and there but never had the courage to post. Well, here I am and I'd really appreciate some help.

I'm probably just freaking myself out but long story short, I'm having a pregnancy scare.

My BF and I have been together for 5 years and have both agreed to hold off on kids till I'm done with school. We've been really careful and hadn't had any scares or anything of the sort till now. We always use a condom, I'm on the pill, and he's even gone the extra mile by buying spermicide gel for our enconters (again- we're very careful).

So we decided to go for a getaway for his birthday on February and according to the app, I was 4 days due for my period and I was on the last pill for the month, so we did the deed with all the protection I mentioned. I got my period a few days later but very light all throughout. Usually it gets heavy on days 3-4 then light and spotty the following 2 days. I didn't pay much attention and the following month it was fairly light again. What really got weird for me was on my period for this month (last week). All five days I had really light almost spotty thick dark blood. That's it. I mentioned this to my friends, as we were on the topic for some reason, and three of them pretty much said that this was their situation before finding out they were pregnant.

This is where I start panicking, I'm psyching myself out, my anxiety attacks are rolling in and out and I just need some clarity and a bit of sanity, here. Could it be possible?

I have an appointment with my OBGYN on Monday but till then any thoughts? Thanks in advance.