Stress or possible pregnancy?

Hey everyone, I've been such a mess for the past two months. I don't know if it's just me who's been ridiculously stressed out from all of this or if there is really a problem going on..

First of all, I only use one form of protection when it comes to sex and that's with a condom. I'm not that sexually active since I'm still young so I don't take the pill. My period usually lasts 5 days, so everything seems somewhat normal. Until...

In March, the first day I had my period was on the 4th. About three weeks after that, I had protected sex with my boyfriend twice on different days. The first time, he reached climax about 5 minutes after pulling out, so obviously nothing went inside of me. The second time, I'm not sure if the condom slipped or what not because he wasn't fully hard at the time BUT he wasn't able to finish. I got a little worried after that since I was feeling a little queasy and my sense of smell was stronger than usual a week after that so I took two hpts and both of them were negative. I ended up having a late period in April, and that started on the 12th. But the thing is, I'm not sure if it was a period or not. It started off with a streak of light-brown in color. I've had this before whenever I had late periods so I thought this was normal. The next day, the bleeding seemed fine like a typical period, not too heavy or too light, so I thought this was okay. However, a day after that, the bleeding seemed to stop at times and there were hours when I wouldn't bleed. Usually I wake up in the morning with a pool of blood but it was definitely close to no blood when I woke up in the morning. With a tampon, everything was absorbed, so I don't know if it was just a light period or what not. A few weeks after that, I had ovulated for days so I thought I'm just having a normal cycle.

But fast forward to now, I've been paranoid and I'm not sure why. Although I'm getting typical PMS symptoms, I'm not sure if the other symptoms relate to PMS as well. Here are some of the "new" symptoms (and some I'm not) getting this month:

- My nipples are super sensitive than usual. They also seem darker in color at times.

- There are some white pimple-like dots on my areolas.

- My breasts seem quite enlarged. They rarely get this big whenever I'm PMSing...

- My temperature is a little bit higher than normal.

- NO morning sickness whatsoever.

The only things that are telling me that I'm not pregnant is the fact that I was safe with sex and that I think I had my period.

I just really need some reassurance because this has been on my mind for so long. I would love to hear words of support because I don't think I can do this on my own. Thank you guys so much.