I'm a bit confused how to use -ing in past tense. This section here for example: She snapped her eyes open, staring into a thick blackness which no light could penetrate. Her heart raced and she breathed rapidly as she could neither move nor see; but as her breath deepened, life streamed back into her limbs and she stood with weary legs. As she rose, shackles scraped along the stone floor, chafing against her skin and weighing against her feet. She staggered backwards as her mind swirled. Where am I? she repeated several times in her head. Can I use 'staring' but I can't use 'chafing' and 'weighing' in the context above? Or should you not use -ing all together in past tense? Also, do think I should use italic when she thinks: 'where am I?'