Looking for some advice


First of sorry if I am posting in the wrong forum. I am mum to a 2.5 year old daughter just recently autism has been being spoken about by the health visitor and wanted some more advice about if that is what I am looking at. 

I have done a lot of research myself and i know no one can diagnose my daughter but just and advice would be great. 

The main cause for concern is the way she acts around other people at home around myself her dad and my two older daughters she is happy and plays and chats and acts mostly like i would expect her to act (a few exceptions but i will go more in to them in a little while) outside of the house she acts different around other people some are strangers some she has met a few times and some she sees regularly and has done since birth but the way she acts around them is the same. for example if we are in a shop and someone speaks to her she puts her head down will not look at them and if they touch her she will rub away the touch and if they still continue she will cry. In my daughters school playground she used to be happy going but now she has to be carried buries her head in my shoulder and asks to go back to the car. I take her to a lot of toddler groups and in these she has fun but only if it is just the two of us at an activity if another child comes over she will want to sit on my lap and stops playing straight away and sometimes acts scared it doesn't matter if this is an adult or another child. At the park if she is going on the slide she gets upset if another child goes up the steps or she will come away and wait for the child to finish before she goes on. 

Her speech isn't great she says a lot of words and uses short sentences but a lot of what she says is not understandable to people who are not round her all the time. i understand 80% of what she says but her dad who doesn't live with us only understands maybe 30%.

She gets very upset over things and it takes her a long time 2-3 hours until she calms down this has been for example because her sister didn't kiss her goodbye or because she left her teddy in the car even after getting the teddy she still cried for a couple of hours after and during this time she kicks and screams and shouts and absolutely nothing i do can distract her. 

She can get upset at small changes such as she always has to wear the same pyjamas and have the same blanket and if these change she will get upset. She also dislikes certain clothes and just refuses to wear them. 

With play she does play imaginatively but she will also line toys up for example she has a wooden bridge and some animals she will walk the animals over the bridge one by one then line them all up at the other end. 

with eye contact she gives me eye contact and her dad and sisters but no one else or just occasional glances and if i take a photo of her in nearly every photo she will not look at me but looks down or in to the distance. 

She will respond to her name sometimes but other times just it is like she doesn't hear me she doesn't respond at all (her hearing has been checked and all fine). 

She will sometimes mutter to herself especially in situations like if someone is talking to her or getting to close to her. 

She is not potty trained and shows no interest in this at all she doesn't tell me when she needs changing and never tells me if she needs to go the toilet. 

Her sleep is awful she wakes up at least every 2 hours and sometimes goes back to sleep quickly and other times it can take hours it is like she doesn't need much sleep as the next day she will still be her normal self and not tired in the day.

Sorry this is so long wanted to make sure i included everything. From this do you think it is something that needs looking in to more? 

Thank you in advance