6-month old suddenly not getting to sleep

My husband and I have a 6 month old baby girl. She is our first, and she is such a blessing and joy everyday. Obviously when she was first born, she was waking up every 2 hours to eat. However, around 2.5-3 months, she started sleeping through the night! I was so happy. For about 3 months straight, she was consistently sleeping about 11 hours every night. Ever since she got to the 6 month mark, however, it has been sooo hard to get her to sleep at night. I’m very confused about what to do because it just happened so suddenly. She takes about 3-4 naps a day with her last one being at 5 pm, and I give her the last bottle of the day around 7:00. Usually she would hit the sack around 7:30 and would wake up at 7 the next morning. Now, every time I try rocking her until she is drowsy, she immediately wakes up when I put her in her crib, and then won’t get to sleep until 9 or 10. I feel like I’m doing something wrong now, and I have no clue! I don’t know if I need to drop a nap or if she’s teething (although she’s not acting like she’s in pain at all) or if I need to up her oz. in her bottles or maybe it’s a growth spurt. Me and dad are just completely confused. I know it may not seem like a big deal because 9 pm is still fairly early, but nights are the only time I get to myself, and I have to go to bed around 10 because she wakes up so early (even when she gets to bed later), so I’d really like any advice or tips I could get. Sorry if this was a bit long, but I just wanted to explain in full. via /r/Parenting https://ift.tt/3iwIMq4