28 weeks pregnant, muscle spasm in left ring and middle fingers. Feels like an eyelid twitch?

Doctor can evaluate. If finger muscle twitching lasts only a day, there may not be a problem. If symptoms recur, or if one's hand is numb, weak, swollen, or discolored, there may be too much pressure (constriction or swelling) inside the wrist. If so, one should see a primary care doctor or a hand surgeon, in case quick treatment is needed to prevent nerve damage at the wrist. Pregnancy often causes hands to swell.
Twitch. Eyelid twitch may be due to stress, fatigue, allergy, or dryness. Discuss possible solutions with your OB doctor.