Being a Mum of 4 boys, 3 of who had reflux you are describing the classic signs. If ever in doubt see the Doctor. Reflux can be silent so constantly burns the throat but baby may not spill or vomit. It is extremely painful and so baby will wake and the only thing that will generally calm them is drinking, sucking on pacifier or sitting/being held in the upright position. This is a medical problem that is easily fixed but must be addressed. It is safe to use Losec (I have always used the capsules, open and tip granules into babies mouth before feeding) and if it is not reflux the medication will not have hurt the baby while you try it out.
Note: You will feel like you are always at the Dr for the first couple of years but just go. Get the information direct from the expert and then you know you have done the best for your child.
Other Mums are fantastic for support and we have all tried and lived different senarios but do seek professional support.
Good luck and hope you get some rest soon.