Have you lost any weight since January?
The key is to find a way of eating and loosing weight that is sustainable for your lifestyle. Exercise is great for your heart, and it helps to tone you but it's very difficult to exercise off excess weight.
I think that the combination of your 'success' so far, and your intestine problems mean that fast weight loss in a short time will be a massive challenge. Plus you don't have that much weight to lose.
I was similar weight, and I lost the first stone in about 12 weeks. The next stone took a further 8 months, and the final half stone is a real challenge.
Sorry that's probably not what you want to hear. But my main message would be to find a way of eating that is sustainable, doesn't make you feel deprived, and is compatible with your intestinal issues. It might be high fat, low carb, it might be some form of intermittent fasting (there are many variations), it might be as simple as reducing your plate size and eating much smaller quantities.
Key things to stop having are sugar and alcohol.