In order to have a case you’ll need to demonstrate that you had received discriminatory treatment/ unfair dismissal as a result of your pregnancy (or pregnancy related illness). In other words, not only do you have to show that your working conditions changed, you’ll also need to prove that the said changes took place because of your pregnancy.
Therefore the timeline is of some importance here. I couldn’t quite grasp the time when you informed your former employer about your pregnancy, by browsing through your other thread. I do apologise if I missed it.
Then with the timeline in mind the question you need to ask yourself is what had changed after you told your boss about your pregnancy.
I.e. Did you start receiving less or no works after it? Or was it a pre-existing problem?
If you really want to pursue this it may help to first sit down and write down the sequence of events.
With a clear mind you will enable your legal help to give you the best advice.
If you decide to take your former employer to court and end up winning the case against him, the court will order him to cover at least a part of your legal fees. But of course this is an issue which you’ll need to discuss with your solicitor.
Having said the above, with practicality in mind and as mentioned by others, moving on may not be such a bad idea if the result of the case doesn’t make a substantial difference to you financially.
I understand how terrible you must have felt but going through a lawsuit can be stressful. You’ll need to make sure this is really what you want to do especially as an expecting mum.
Good luck with everything!