Uy, mama, seryoso lang, kung masakit ang tiyan mo kahit intermittent, kailangan mo talaga mag-check sa OB mo ASAP, lalo na at 8 months ka na. Hindi worth the risk na maghintay lang, especially this far along!
A few of us mums learned the hard way na better safe than sorry sa third trimester, kaya please go and get checked tomorrow or today pa lang if mabigat ang sakit. Your baby and you deserve peace of mind, and your doctor needs to know what's happening. Sending you love, let me know you're okay!