Period pain!

So today was the first day of my period and I got horrible cramps like I’ve never had before. I was literally in tears for 15minutes. From like 7:30am to 2:00 pm my flow was extremely heavy. Is this normal for my period to be so severe randomly? I’ve been taking Ibuprofen 600mg to help the pain and it works for about 5-6hours. I’ve had my period for about 6 years now and I used to get bad cramps but haven’t for awhile. Advice please!?