Thanks for your question on Health Care Magic. I can understand your concern. Since you are overweight and having high blood pressure, better to first rule out heart diseases because left sided chest and shoulder pain are common in heart diseases. So get done ecg and 2d echo. If both are normal then no need to worry for heart diseases. Musculoskeletal pain is another possibility because of carrying of baby. So take painkiller and muscle relaxant drugs. Apply warm water pad on affected areas. For weight reduction, strict dieting is needed. Along with dieting, do regular aerobic exercise like running, cycling, swimming etc. You can go to aerobics and gym. Don t worry, you will be alright. But first rule out heart diseases. Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.