I have three sons with severe dyspraxia and the severest also has atypical autism. So I have some experience of both conditions and their overlap.
Years ago a consultant paediatrician who specialised in this kind of area, said to me that you have to think of the dyspraxic child as having a sense of touch that is as impaired as a visually impaired person's hearing, or a hearing impaired person's hearing. This causes things you might not immediately ascribe to the dyspraxia, including being food fussy (because it's the textures of certain things they might find repulsive) and touch sensitive (Finding perfectly normal clothing 'scratchy' for example). So you may be describing a child wit dyspraxia there.
19 months is early - too early, honestly, for diagnosis. But looking back, my three dyspraxic sons did display some behaviours, developmental difficulties, etc that in retrospect we could see were caused by the dyspraxia. It would have been inappropriate to jump to diagnosis so soon.
One son could only eat white and dry foods. One would only eat gingerbread men and yogurt! One wants to throw up if his hands or feet touch... pebbles or hard, small stones. Silly things like that. One son never crawled - he just writhed along the floor like a slug and then one day, walked. (The same child could sit holding his own head up, the week he was born - the midwives commented on it and that they'd never seen a baby do that). Two had significant - I mean significant - speech delays. (The son with autism and dyspraxia). My two eldest sons could ot speak til they were around 5 - one of them later went on to have his IQ measured at somewhere "well above 160" so don't confuse developmental delays with intellectual and cognitive difficulties. Comparing the 3 dyspraxic sons to the 2 non dyspraxic, I can see the dyspraxic sons had whole varying constellations of small or HUGE difficulties, the non dyspraxic two never faced.
I'd get all the info you can from the Dyspraxia Foundation, but also maybe start getting some info from the Autistic Society as well.
The spectrum probably doesn't overlap so much with dyspraxia - any autistic kids have no dyspraxia. But some of the ways both may manifest, may share similarities.
One of my sons was diagnosed at 2 and 1/2 and I was told that was the youngest child with an educational statement in the LEA. And we were living in the UK's largest LEA. But I understand his early diagnosis was rare for these conditions. Later it took half a day of standardised tests at what was then the foremost clinic for diagnosing autism, (I happened to live 2 streets away so pure good luck my GP could refer there!) Then they could get a clearer picture of my son's autism and dyspraxia and how each condition affected him, as it was complex. In some areas, severe dyspraxia can be even more dramatic, I was told, than autism. Depending on the severity. To reassure you, this son despite his difficulties and leaving school with no GCSEs, is currently at university and doing very well there.
I'd say it is a bit too early to get going and what you're seeing is by no means at the far end of either the autistic spectrum or dyspraxia, but get yourself armed with info so you know what to look out for.