irregular period help

I am a teen and I got my first period November 2016 for 4 days, light. I stopped having it until march 2017 which was for 4 days and light, again. I then had it again in April but it was very heavy and I could fill a pad in an hour, I had lots of blood clots for 3 days but on the 4th it was light. I haven't gotten it since and I was wondering if this is normal since I've only had 3 menstrual cycles. I feel like this week I've been noticing PMS. Is this normal for teens who first got their period? Any advice?