Panic attacks? Mood swings? Is something seriously wrong?

For just over a year I've been having something that I'd describe as a 'breakdown'. I've had 5 or so in the last year and whenever I've had them they've come out of the blue, I cry and shake uncontrollably and my breath gets faster and sometimes I do struggle to breathe. I feel like I had lost control of everything and I've felt claustrophobic inside my house. I felt trapped and that I needed to escape but I couldn't go any where. I did a b8t of googling and they sounded similar to a panic attack but I'm not sure. They only started when I started dating my first boyfriend but I had other issues (to do with my mental health in the past) and I used to cry a lot then as well. I've also noticed in recent months that I can have really bad mood swings. One minute I'll be all happy and the next I'll hate everyone and blame everyone for my mistakes. I got the implant just under a year ago which will have changed my chemical balance but I don't think it'd take this long to have an impact. I'm starting to get worried about what's happening to me so does anyone have any advice to help. I'm currently volunteering abroad for a year so I won't be able to see a doctor for at least 6 months but is there anything I can do in the meantime to help? Thanks in advance