Any Advice?

My husband and I are TTC about 9 months strong now.

AF came on about 4 days early. My cycle is usually around 28/29 days. I had absolutely no cramps to let me know it was coming or that it was on. It’s been kinda heavy (going through about 2/3 overnight plus pads a day). The bleeding (sorry TMI) is bright red with lots of stringy lining... a lot more than usual. But I have had the worst back pain for the past 3 days. It’s in the middle of my lower back and severe. I’ve been keeping a heating pad on it. There’s not too many pain pills I can take because I have lots of stomach problems. Now it feels like my legs go numb quickly as well. I’m thinking that I should go to the ER tomorrow if it’s not any better. I just wanted to know if any of you have experienced anything like this.

Sorry for rambling but thank you for your time.