Question: I am a 20 year old Female. I ended my period around the 21st of August, and started to take my birth control (Lutera) again. Unfortunately, I lost my pack of pills after taking two of them. As this was my last month’s supply after I had to go see my doctor to get a new prescription, I decided to wait for my appointment in a couple weeks and just skip the pills this month (I only take them to control my heavy menstrual bleeding). I figured since I only took two, it shouldn’t throw off my period. I started to bleed from my Vagina Wednesday the 29th, and I assumed those two pills did throw my period off and I was starting my period again a week later. While I was at work on the 29th, I became a little bit worried that this may not be my period since I was getting no cramps. But I eventually shrugged it off, because it started acting a lot more like a period. The following day, I woke up (around 10am) to find out the bleeding was heavier than normal (I don’t normally bleed a lot at night), which I suppose was to be expected since I hadn’t taken any pills all week. I did unfortunately bleed through my pad, my underwear and my shorts and became a bit woozy when I realized how much blood I lost. I called into work and got my shift covered, took an iron pill and slept until about 3pm. I did have to go into work at 7 for a separate shift, but by then I felt fine. The one thing that was super strange was I tried to put in a light tampon (it was all I had at the moment) and I couldn’t get it all the way in. I pulled out the first one (with almost no pain, there was apparently enough blood to lubricate the walls still) and tried again but I had the same problem. It felt like I had hit something (like the back/top? Of the vagina) but normally when I feel that sensation, the tampon is far enough in. This was definitely not the case, but I kept it in despite the fact that I could feel it when I walked. I went to work, and there were no real issues. I did have to change my tampon while I was at work, and I still couldn’t get it in correctly. I left it in, and the rest of the night went pretty smooth. I woke up today, and felt fine. I didn’t lose a massive amount of blood while I slept, which was good. I was going to attempt to go to work with just a pad, since I couldn’t seem to use the tampons correctly. I got to work at 5pm and worked for about an hour with no issues. I went to the bathroom because I felt like I needed to change my pad. While I was in the bathroom I realized I wouldn’t be able to work until midnight with just a pad, because I was losing quite a bit of blood just using the restroom. So again, I tried to insert another tampon, trying a different position this time. I had the same problem, I felt like something was in the way, like something was swollen up there and was blocking my tampon from going in far enough. I went back to work, but after about 5-10 minutes I started to experience severe nausea (I actually ran to the bathroom), dizziness, and slight loss of balance. I also started to get a headache, but that might have been associated with the stress of trying to get my shift covered on such short notice. My manager came down about 10 minutes after, and had another employee drive me home. I assumed I was either going into shock, or was becoming slightly anemic due to the blood loss (since I was fine before I went to the bathroom). I got home and took an iron pill and slowly started to feel better.
So my question is: Is this my period? Why can’t I put in a tampon all the way? Is it possible that something is swollen and is partially blocking the tampon? I think the symptoms from earlier today were probably from blood loss, so is there anything I should be doing besides taking iron pills to fight this?

Thank you for all of your time.