Mama, please check with your OB agad, especially with the heaviness and tightening, mas safe na ma-assess ng doctor, lalo na at malapit ka na sa 36 weeks. You're so close to meeting your baby, and you're doing amazing by paying attention to what your body is telling you! These things can be normal, but your doctor needs to hear about it para ma-rule out anything that needs extra care. You've got this, and you're being such a thoughtful mama by asking.