Really worried

Hi guys. would really appreciate any advice.

I have had regular period upto 3 months ago when I started bleeding constantly , havent had a day since without, few weeks after started with pelvic and lower back pain, pelvic pain is mainly left side but can go into right. This is extremely painful and without let up, has me doubled over sometimes.

Just in the past 3 weeks I have also struggled with going to the toilet, feel like I need to wee when I dont need to, which is a weird one but is making me panic.

I have a scan next week so hopefully get some answers but I'm really worried. Any advice would be appreciated. Many thanks