Nervous

I'm almost 34 weeks and I've been having Braxton hicks since about 25 weeks so they don't alarm me. Just now however I just had the strongest most intense contraction. I had to get out if bed I tried to sit on the toilet- I peed and just had to breath through it. It lasted about 1-2 minutes. My husband is away on a business trip and I am staying at my parents house with my son (15 months old). It felt like something was wrapped around my back and being tied tightly all around my midsection. Just another more intense Braxton hick or real contraction? My son was an early scheduled c section so I've never felt labor pains.....