3 year old very anxious and upset over going to nursery

[apple85]

Hi. I'm feeling quite low at the moment as I'm worrying over my Dd who is 3 years 9 months. She's always been quite a confident child and when she started school nursery in September there were no issues with me leaving her etc. Then around a month ago she started crying when I took her in the mornings. She cries and it's quite difficult to settle her. I've asked her what's wrong and talked to her about it. She says some general stuff about other girls not wanting to be her friend etc but nothing major. I have spoken to nursery and they have said she is fine after a while but does keep saying she misses me. Anyway it's got worse and today she said she didn't want to go in and her tummy hurt. She really didn't seem herself. She then went to the loo and (tmi)had the runs. I rang in booked the day off work and said to her she wasn't going in. She almost straight away perked up and started saying she felt better. As the morning has gone on she seems fine now. I feel a bit worried about her and about everything really as I can't keep taking time off work but at the same time she seems really unhappy going to nursery. Any advice would be appreciated

[ASmidgeofMidge]

Has anything changed at home? I'm thinking pregnancy, house move, illness - something that could make her feel nervous about not being at home? My dd went through similar at school late last year - much of it turned out to be anxiety about the impending arrival of her little brother.