You really need to find out what is going on with this lump. I would suggest you have a CT of the abdomen or ultrasound to visualize the lump and determine what is going on. This oould be either some sort of mass in your abdomen, or some sort of muscle that is protruding or even a large hiatal hernia. Either way, if your stomach is getting worse, you really do need to have this imaged.
Hope this helps, reply back if needed.
Don't forget...You will need to click ACCEPT or the $$$ you have put down as a deposit will not go to me. JustAnswer.com will hold your deposit and I will not get credit for my time and efforts.
Blood thinners should not cause a lump in your abdomen. I agree, you really do need someone who will listen to you and get your the scan you need. Another option is to have your OB/GYN order you a test or just show up at the Emergency Room and tell you have a lump in your abdomen and you need it checked out...they cannot turn you away. Don't give up yet....you will get you tested and get to the bottom of what might be going on.