Someone once explained to me that babies & kids constantly switch between different areas of development. One week they'll work on some type of physical skill, then they'll stop and work on social interactions, and then on to understanding mental connections. So maybe your daughter is taking a break from speech, and she's concentrating on reaching & grasping. Or she may be learning your facial expressions in reaction to what she does. There's so much to learn! Just keep talking to her, she'll be squeaking back at you before you know it.
Edit: My son didn't talk much until he was 2.5 years old. We had him checked for hearing problems and developmental delays, but there was nothing wrong, he just didn't feel like talking. He was very advanced physically, I even put him in gymnastics because he is very high-energy and needed the challenge. We also taught him sign language to help with communication problems. He could understand really complicated instructions, and had a very sharp memory. But he would only say "mama", "dada", and "please." All of a sudden at 2.5 he just started speaking in full sentences like he'd been doing it all along.
Just keep reminding yourself that every kid is different, but they all catch up eventually.